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02b59d57 TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
987efa17 TG |
20 | #include <net/if.h> |
21 | ||
b5efdb8a | 22 | #include "alloc-util.h" |
02b59d57 TG |
23 | #include "conf-files.h" |
24 | #include "conf-parser.h" | |
3ffd4af2 | 25 | #include "fd-util.h" |
02b59d57 | 26 | #include "list.h" |
fc2f9534 LP |
27 | #include "netlink-util.h" |
28 | #include "network-internal.h" | |
3ffd4af2 | 29 | #include "networkd-netdev.h" |
fc2f9534 | 30 | #include "networkd.h" |
07630cea | 31 | #include "siphash24.h" |
8fcde012 | 32 | #include "stat-util.h" |
8b43440b | 33 | #include "string-table.h" |
07630cea | 34 | #include "string-util.h" |
02b59d57 | 35 | |
3be1d7e0 | 36 | const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { |
fc2f9534 | 37 | |
3be1d7e0 TG |
38 | [NETDEV_KIND_BRIDGE] = &bridge_vtable, |
39 | [NETDEV_KIND_BOND] = &bond_vtable, | |
40 | [NETDEV_KIND_VLAN] = &vlan_vtable, | |
41 | [NETDEV_KIND_MACVLAN] = &macvlan_vtable, | |
f33ff02b | 42 | [NETDEV_KIND_MACVTAP] = &macvtap_vtable, |
c4a5ddc9 | 43 | [NETDEV_KIND_IPVLAN] = &ipvlan_vtable, |
3be1d7e0 TG |
44 | [NETDEV_KIND_VXLAN] = &vxlan_vtable, |
45 | [NETDEV_KIND_IPIP] = &ipip_vtable, | |
46 | [NETDEV_KIND_GRE] = &gre_vtable, | |
1af2536a | 47 | [NETDEV_KIND_GRETAP] = &gretap_vtable, |
b16492f8 SS |
48 | [NETDEV_KIND_IP6GRE] = &ip6gre_vtable, |
49 | [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable, | |
3be1d7e0 TG |
50 | [NETDEV_KIND_SIT] = &sit_vtable, |
51 | [NETDEV_KIND_VTI] = &vti_vtable, | |
9011ce77 | 52 | [NETDEV_KIND_VTI6] = &vti6_vtable, |
3be1d7e0 TG |
53 | [NETDEV_KIND_VETH] = &veth_vtable, |
54 | [NETDEV_KIND_DUMMY] = &dummy_vtable, | |
55 | [NETDEV_KIND_TUN] = &tun_vtable, | |
56 | [NETDEV_KIND_TAP] = &tap_vtable, | |
855ee1a1 | 57 | [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable, |
3be1d7e0 TG |
58 | }; |
59 | ||
2c5859af | 60 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
52433f6b | 61 | [NETDEV_KIND_BRIDGE] = "bridge", |
54abf461 TG |
62 | [NETDEV_KIND_BOND] = "bond", |
63 | [NETDEV_KIND_VLAN] = "vlan", | |
fe6b2d55 | 64 | [NETDEV_KIND_MACVLAN] = "macvlan", |
f33ff02b | 65 | [NETDEV_KIND_MACVTAP] = "macvtap", |
c4a5ddc9 | 66 | [NETDEV_KIND_IPVLAN] = "ipvlan", |
326cb406 | 67 | [NETDEV_KIND_VXLAN] = "vxlan", |
7951dea2 SS |
68 | [NETDEV_KIND_IPIP] = "ipip", |
69 | [NETDEV_KIND_GRE] = "gre", | |
1af2536a | 70 | [NETDEV_KIND_GRETAP] = "gretap", |
b16492f8 SS |
71 | [NETDEV_KIND_IP6GRE] = "ip6gre", |
72 | [NETDEV_KIND_IP6GRETAP] = "ip6gretap", | |
7951dea2 | 73 | [NETDEV_KIND_SIT] = "sit", |
10142d75 | 74 | [NETDEV_KIND_VETH] = "veth", |
9e358851 | 75 | [NETDEV_KIND_VTI] = "vti", |
9011ce77 | 76 | [NETDEV_KIND_VTI6] = "vti6", |
9e358851 | 77 | [NETDEV_KIND_DUMMY] = "dummy", |
30ae9dfd SS |
78 | [NETDEV_KIND_TUN] = "tun", |
79 | [NETDEV_KIND_TAP] = "tap", | |
855ee1a1 | 80 | [NETDEV_KIND_IP6TNL] = "ip6tnl", |
52433f6b | 81 | }; |
02b59d57 | 82 | |
1a436809 TG |
83 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
84 | DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind"); | |
52433f6b | 85 | |
59cb64e6 | 86 | static void netdev_cancel_callbacks(NetDev *netdev) { |
4afd3348 | 87 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
3f265037 | 88 | netdev_join_callback *callback; |
52433f6b TG |
89 | |
90 | if (!netdev) | |
02b59d57 TG |
91 | return; |
92 | ||
59cb64e6 TG |
93 | rtnl_message_new_synthetic_error(-ENODEV, 0, &m); |
94 | ||
52433f6b | 95 | while ((callback = netdev->callbacks)) { |
59cb64e6 TG |
96 | if (m) { |
97 | assert(callback->link); | |
98 | assert(callback->callback); | |
99 | assert(netdev->manager); | |
100 | assert(netdev->manager->rtnl); | |
101 | ||
b024a9cf | 102 | callback->callback(netdev->manager->rtnl, m, callback->link); |
59cb64e6 TG |
103 | } |
104 | ||
52433f6b | 105 | LIST_REMOVE(callbacks, netdev->callbacks, callback); |
62e2d5bb | 106 | link_unref(callback->link); |
02b59d57 TG |
107 | free(callback); |
108 | } | |
59cb64e6 TG |
109 | } |
110 | ||
111 | static void netdev_free(NetDev *netdev) { | |
112 | if (!netdev) | |
113 | return; | |
114 | ||
115 | netdev_cancel_callbacks(netdev); | |
02b59d57 | 116 | |
af4e9e2c TG |
117 | if (netdev->ifname) |
118 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
02b59d57 | 119 | |
52433f6b | 120 | free(netdev->filename); |
02b59d57 | 121 | |
52433f6b | 122 | free(netdev->description); |
af4e9e2c | 123 | free(netdev->ifname); |
96c90742 | 124 | free(netdev->mac); |
02b59d57 | 125 | |
79e16ce3 LP |
126 | condition_free_list(netdev->match_host); |
127 | condition_free_list(netdev->match_virt); | |
128 | condition_free_list(netdev->match_kernel); | |
129 | condition_free_list(netdev->match_arch); | |
130 | ||
aa9f1140 TG |
131 | if (NETDEV_VTABLE(netdev) && |
132 | NETDEV_VTABLE(netdev)->done) | |
133 | NETDEV_VTABLE(netdev)->done(netdev); | |
134 | ||
52433f6b | 135 | free(netdev); |
02b59d57 TG |
136 | } |
137 | ||
14b746f7 TG |
138 | NetDev *netdev_unref(NetDev *netdev) { |
139 | if (netdev && (-- netdev->n_ref <= 0)) | |
140 | netdev_free(netdev); | |
141 | ||
142 | return NULL; | |
143 | } | |
144 | ||
145 | NetDev *netdev_ref(NetDev *netdev) { | |
146 | if (netdev) | |
147 | assert_se(++ netdev->n_ref >= 2); | |
148 | ||
149 | return netdev; | |
150 | } | |
151 | ||
2cc7e981 TG |
152 | void netdev_drop(NetDev *netdev) { |
153 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
154 | return; | |
155 | ||
156 | netdev->state = NETDEV_STATE_LINGER; | |
157 | ||
79008bdd | 158 | log_netdev_debug(netdev, "netdev removed"); |
370e9930 | 159 | |
2cc7e981 TG |
160 | netdev_cancel_callbacks(netdev); |
161 | ||
162 | netdev_unref(netdev); | |
163 | ||
164 | return; | |
165 | } | |
166 | ||
1a436809 TG |
167 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
168 | NetDev *netdev; | |
02b59d57 TG |
169 | |
170 | assert(manager); | |
171 | assert(name); | |
172 | assert(ret); | |
173 | ||
52433f6b TG |
174 | netdev = hashmap_get(manager->netdevs, name); |
175 | if (!netdev) { | |
02b59d57 TG |
176 | *ret = NULL; |
177 | return -ENOENT; | |
178 | } | |
179 | ||
52433f6b | 180 | *ret = netdev; |
02b59d57 TG |
181 | |
182 | return 0; | |
183 | } | |
184 | ||
1a436809 | 185 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 186 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 | 187 | |
62e2d5bb TG |
188 | netdev_cancel_callbacks(netdev); |
189 | ||
02b59d57 TG |
190 | return 0; |
191 | } | |
192 | ||
1c4baffc | 193 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) { |
4afd3348 | 194 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
02b59d57 TG |
195 | int r; |
196 | ||
52433f6b TG |
197 | assert(netdev); |
198 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
199 | assert(netdev->manager); |
200 | assert(netdev->manager->rtnl); | |
3f265037 | 201 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); |
02b59d57 TG |
202 | assert(link); |
203 | assert(callback); | |
204 | ||
6a7a4e4d LP |
205 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
206 | if (r < 0) | |
207 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m"); | |
02b59d57 | 208 | |
1c4baffc | 209 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
6a7a4e4d LP |
210 | if (r < 0) |
211 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m"); | |
02b59d57 | 212 | |
1c4baffc | 213 | r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
6a7a4e4d LP |
214 | if (r < 0) |
215 | return log_netdev_error(netdev, "Could not send rtnetlink message: %m"); | |
02b59d57 | 216 | |
563c69c6 TG |
217 | link_ref(link); |
218 | ||
6a7a4e4d | 219 | log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname); |
ab47d620 | 220 | |
02b59d57 TG |
221 | return 0; |
222 | } | |
223 | ||
1a436809 | 224 | static int netdev_enter_ready(NetDev *netdev) { |
3f265037 | 225 | netdev_join_callback *callback, *callback_next; |
ad0774e6 | 226 | int r; |
02b59d57 | 227 | |
52433f6b | 228 | assert(netdev); |
af4e9e2c | 229 | assert(netdev->ifname); |
924fe430 | 230 | |
ba5596ec TG |
231 | if (netdev->state != NETDEV_STATE_CREATING) |
232 | return 0; | |
233 | ||
52433f6b | 234 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 235 | |
98b32556 | 236 | log_netdev_info(netdev, "netdev ready"); |
02b59d57 | 237 | |
ad0774e6 | 238 | LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) { |
b226d99b | 239 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 240 | * link was ready */ |
ad0774e6 TG |
241 | r = netdev_enslave_ready(netdev, callback->link, callback->callback); |
242 | if (r < 0) | |
243 | return r; | |
244 | ||
245 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
246 | link_unref(callback->link); | |
247 | free(callback); | |
02b59d57 TG |
248 | } |
249 | ||
540eb5f0 SS |
250 | if (NETDEV_VTABLE(netdev)->post_create) |
251 | NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL); | |
252 | ||
02b59d57 TG |
253 | return 0; |
254 | } | |
8469c1d3 | 255 | |
d5b3d845 | 256 | /* callback for netdev's created without a backing Link */ |
1c4baffc | 257 | static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
8900367c | 258 | _cleanup_netdev_unref_ NetDev *netdev = userdata; |
172f6635 | 259 | int r; |
02b59d57 | 260 | |
52433f6b | 261 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 | 262 | |
1c4baffc | 263 | r = sd_netlink_message_get_errno(m); |
e09826dc | 264 | if (r == -EEXIST) |
98b32556 | 265 | log_netdev_info(netdev, "netdev exists, using existing without changing its parameters"); |
505f8da7 | 266 | else if (r < 0) { |
6a7a4e4d | 267 | log_netdev_warning_errno(netdev, r, "netdev could not be created: %m"); |
37ebeb77 | 268 | netdev_drop(netdev); |
dd3efc09 TG |
269 | |
270 | return 1; | |
02b59d57 TG |
271 | } |
272 | ||
6a7a4e4d | 273 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 274 | |
dd3efc09 | 275 | return 1; |
02b59d57 TG |
276 | } |
277 | ||
1c4baffc | 278 | int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) { |
b226d99b TG |
279 | int r; |
280 | ||
3f265037 | 281 | assert(netdev); |
62e2d5bb TG |
282 | assert(netdev->manager); |
283 | assert(netdev->manager->rtnl); | |
3f265037 | 284 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); |
7951dea2 | 285 | |
52433f6b | 286 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
287 | r = netdev_enslave_ready(netdev, link, callback); |
288 | if (r < 0) | |
289 | return r; | |
62e2d5bb | 290 | } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) { |
4afd3348 | 291 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
62e2d5bb TG |
292 | |
293 | r = rtnl_message_new_synthetic_error(-ENODEV, 0, &m); | |
294 | if (r >= 0) | |
295 | callback(netdev->manager->rtnl, m, link); | |
02b59d57 | 296 | } else { |
d076c6f9 | 297 | /* the netdev is not yet read, save this request for when it is */ |
3f265037 | 298 | netdev_join_callback *cb; |
02b59d57 | 299 | |
3f265037 | 300 | cb = new0(netdev_join_callback, 1); |
02b59d57 TG |
301 | if (!cb) |
302 | return log_oom(); | |
303 | ||
304 | cb->callback = callback; | |
305 | cb->link = link; | |
563c69c6 | 306 | link_ref(link); |
02b59d57 | 307 | |
52433f6b | 308 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
3be1d7e0 | 309 | |
6a7a4e4d | 310 | log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname); |
aa9f1140 | 311 | } |
3f265037 TG |
312 | |
313 | return 0; | |
314 | } | |
315 | ||
1c4baffc | 316 | int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) { |
c3ebdce3 | 317 | uint16_t type; |
d39edfc7 | 318 | const char *kind; |
ca4e095a LP |
319 | const char *received_kind; |
320 | const char *received_name; | |
d39edfc7 TG |
321 | int r, ifindex; |
322 | ||
50add290 | 323 | assert(netdev); |
c3ebdce3 | 324 | assert(message); |
02b59d57 | 325 | |
1c4baffc | 326 | r = sd_netlink_message_get_type(message, &type); |
6a7a4e4d LP |
327 | if (r < 0) |
328 | return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m"); | |
c3ebdce3 | 329 | |
ba5596ec | 330 | if (type != RTM_NEWLINK) { |
6a7a4e4d | 331 | log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type."); |
c3ebdce3 | 332 | return -EINVAL; |
ba5596ec | 333 | } |
d39edfc7 | 334 | |
a21df104 TG |
335 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
336 | if (r < 0) { | |
6a7a4e4d | 337 | log_netdev_error_errno(netdev, r, "Could not get ifindex: %m"); |
a21df104 TG |
338 | netdev_enter_failed(netdev); |
339 | return r; | |
340 | } else if (ifindex <= 0) { | |
79008bdd | 341 | log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex); |
a21df104 | 342 | netdev_enter_failed(netdev); |
6a7a4e4d | 343 | return -EINVAL; |
a21df104 TG |
344 | } |
345 | ||
a21df104 TG |
346 | if (netdev->ifindex > 0) { |
347 | if (netdev->ifindex != ifindex) { | |
79008bdd | 348 | log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d", |
a21df104 TG |
349 | ifindex, netdev->ifindex); |
350 | netdev_enter_failed(netdev); | |
351 | return -EEXIST; | |
352 | } else | |
353 | /* ifindex already set to the same for this netdev */ | |
354 | return 0; | |
355 | } | |
356 | ||
1c4baffc | 357 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name); |
6a7a4e4d LP |
358 | if (r < 0) |
359 | return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m"); | |
c6315a7a | 360 | |
af4e9e2c | 361 | if (!streq(netdev->ifname, received_name)) { |
6a7a4e4d | 362 | log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name); |
c6315a7a TG |
363 | netdev_enter_failed(netdev); |
364 | return r; | |
365 | } | |
366 | ||
1c4baffc | 367 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); |
6a7a4e4d LP |
368 | if (r < 0) |
369 | return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m"); | |
d39edfc7 | 370 | |
1c4baffc | 371 | r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind); |
6a7a4e4d LP |
372 | if (r < 0) |
373 | return log_netdev_error_errno(netdev, r, "Could not get KIND: %m"); | |
d39edfc7 | 374 | |
1c4baffc | 375 | r = sd_netlink_message_exit_container(message); |
6a7a4e4d LP |
376 | if (r < 0) |
377 | return log_netdev_error_errno(netdev, r, "Could not exit container: %m"); | |
505f8da7 | 378 | |
30ae9dfd SS |
379 | if (netdev->kind == NETDEV_KIND_TAP) |
380 | /* the kernel does not distinguish between tun and tap */ | |
381 | kind = "tun"; | |
382 | else { | |
383 | kind = netdev_kind_to_string(netdev->kind); | |
384 | if (!kind) { | |
79008bdd | 385 | log_netdev_error(netdev, "Could not get kind"); |
30ae9dfd SS |
386 | netdev_enter_failed(netdev); |
387 | return -EINVAL; | |
388 | } | |
c3ebdce3 TG |
389 | } |
390 | ||
d39edfc7 | 391 | if (!streq(kind, received_kind)) { |
79008bdd | 392 | log_netdev_error(netdev, |
30ae9dfd | 393 | "Received newlink with wrong KIND %s, " |
c6315a7a | 394 | "expected %s", received_kind, kind); |
d39edfc7 TG |
395 | netdev_enter_failed(netdev); |
396 | return r; | |
397 | } | |
398 | ||
50add290 | 399 | netdev->ifindex = ifindex; |
52433f6b | 400 | |
79008bdd | 401 | log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex); |
5261692f | 402 | |
52433f6b | 403 | netdev_enter_ready(netdev); |
02b59d57 TG |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
5c8f858d TG |
408 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
409 | ||
3be1d7e0 | 410 | int netdev_get_mac(const char *ifname, struct ether_addr **ret) { |
5c8f858d | 411 | _cleanup_free_ struct ether_addr *mac = NULL; |
dbe81cbd | 412 | uint64_t result; |
5c8f858d TG |
413 | size_t l, sz; |
414 | uint8_t *v; | |
415 | int r; | |
416 | ||
417 | assert(ifname); | |
418 | assert(ret); | |
419 | ||
420 | mac = new0(struct ether_addr, 1); | |
421 | if (!mac) | |
422 | return -ENOMEM; | |
423 | ||
424 | l = strlen(ifname); | |
425 | sz = sizeof(sd_id128_t) + l; | |
426 | v = alloca(sz); | |
427 | ||
428 | /* fetch some persistent data unique to the machine */ | |
429 | r = sd_id128_get_machine((sd_id128_t*) v); | |
430 | if (r < 0) | |
431 | return r; | |
432 | ||
433 | /* combine with some data unique (on this machine) to this | |
434 | * netdev */ | |
435 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
436 | ||
437 | /* Let's hash the host machine ID plus the container name. We | |
438 | * use a fixed, but originally randomly created hash key here. */ | |
933f9cae | 439 | result = siphash24(v, sz, HASH_KEY.bytes); |
5c8f858d TG |
440 | |
441 | assert_cc(ETH_ALEN <= sizeof(result)); | |
dbe81cbd | 442 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
5c8f858d TG |
443 | |
444 | /* see eth_random_addr in the kernel */ | |
445 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
446 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
447 | ||
448 | *ret = mac; | |
449 | mac = NULL; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
6c3e68e7 | 454 | static int netdev_create(NetDev *netdev, Link *link, |
1c4baffc | 455 | sd_netlink_message_handler_t callback) { |
aa9f1140 TG |
456 | int r; |
457 | ||
458 | assert(netdev); | |
6c3e68e7 | 459 | assert(!link || callback); |
aa9f1140 TG |
460 | |
461 | /* create netdev */ | |
462 | if (NETDEV_VTABLE(netdev)->create) { | |
6c3e68e7 TG |
463 | assert(!link); |
464 | ||
aa9f1140 TG |
465 | r = NETDEV_VTABLE(netdev)->create(netdev); |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
6a7a4e4d | 469 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 470 | } else { |
4afd3348 | 471 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
aa9f1140 TG |
472 | |
473 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
6a7a4e4d LP |
474 | if (r < 0) |
475 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m"); | |
aa9f1140 | 476 | |
1c4baffc | 477 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); |
6a7a4e4d LP |
478 | if (r < 0) |
479 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m"); | |
aa9f1140 TG |
480 | |
481 | if (netdev->mac) { | |
1c4baffc | 482 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); |
6a7a4e4d LP |
483 | if (r < 0) |
484 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m"); | |
aa9f1140 TG |
485 | } |
486 | ||
487 | if (netdev->mtu) { | |
1c4baffc | 488 | r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); |
6a7a4e4d LP |
489 | if (r < 0) |
490 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m"); | |
aa9f1140 TG |
491 | } |
492 | ||
493 | if (link) { | |
1c4baffc | 494 | r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex); |
6a7a4e4d LP |
495 | if (r < 0) |
496 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m"); | |
aa9f1140 TG |
497 | } |
498 | ||
1c4baffc | 499 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
6a7a4e4d LP |
500 | if (r < 0) |
501 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 502 | |
1c4baffc | 503 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); |
6a7a4e4d LP |
504 | if (r < 0) |
505 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); | |
aa9f1140 TG |
506 | |
507 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
508 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
509 | if (r < 0) | |
510 | return r; | |
511 | } | |
512 | ||
1c4baffc | 513 | r = sd_netlink_message_close_container(m); |
6a7a4e4d LP |
514 | if (r < 0) |
515 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 516 | |
1c4baffc | 517 | r = sd_netlink_message_close_container(m); |
6a7a4e4d LP |
518 | if (r < 0) |
519 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 520 | |
6c3e68e7 | 521 | if (link) { |
1c4baffc | 522 | r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL); |
6a7a4e4d LP |
523 | if (r < 0) |
524 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
aa9f1140 | 525 | |
6c3e68e7 TG |
526 | link_ref(link); |
527 | } else { | |
1c4baffc | 528 | r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL); |
6a7a4e4d LP |
529 | if (r < 0) |
530 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
6c3e68e7 TG |
531 | |
532 | netdev_ref(netdev); | |
533 | } | |
aa9f1140 TG |
534 | |
535 | netdev->state = NETDEV_STATE_CREATING; | |
536 | ||
6a7a4e4d | 537 | log_netdev_debug(netdev, "Creating"); |
aa9f1140 TG |
538 | } |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ | |
1c4baffc | 544 | int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) { |
aa9f1140 TG |
545 | int r; |
546 | ||
547 | assert(netdev); | |
548 | assert(netdev->manager); | |
549 | assert(netdev->manager->rtnl); | |
550 | assert(NETDEV_VTABLE(netdev)); | |
551 | ||
552 | switch (NETDEV_VTABLE(netdev)->create_type) { | |
553 | case NETDEV_CREATE_MASTER: | |
554 | r = netdev_enslave(netdev, link, callback); | |
555 | if (r < 0) | |
556 | return r; | |
557 | ||
558 | break; | |
559 | case NETDEV_CREATE_STACKED: | |
6c3e68e7 | 560 | r = netdev_create(netdev, link, callback); |
aa9f1140 TG |
561 | if (r < 0) |
562 | return r; | |
563 | ||
564 | break; | |
565 | default: | |
566 | assert_not_reached("Can not join independent netdev"); | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
52433f6b | 572 | static int netdev_load_one(Manager *manager, const char *filename) { |
14b746f7 | 573 | _cleanup_netdev_unref_ NetDev *netdev = NULL; |
aa9f1140 | 574 | _cleanup_free_ NetDev *netdev_raw = NULL; |
02b59d57 TG |
575 | _cleanup_fclose_ FILE *file = NULL; |
576 | int r; | |
577 | ||
bf1bc670 TA |
578 | assert(manager); |
579 | assert(filename); | |
580 | ||
02b59d57 TG |
581 | file = fopen(filename, "re"); |
582 | if (!file) { | |
583 | if (errno == ENOENT) | |
584 | return 0; | |
585 | else | |
ecb08ec6 | 586 | return -errno; |
02b59d57 TG |
587 | } |
588 | ||
ed88bcfb ZJS |
589 | if (null_or_empty_fd(fileno(file))) { |
590 | log_debug("Skipping empty file: %s", filename); | |
591 | return 0; | |
592 | } | |
593 | ||
aa9f1140 TG |
594 | netdev_raw = new0(NetDev, 1); |
595 | if (!netdev_raw) | |
02b59d57 TG |
596 | return log_oom(); |
597 | ||
aa9f1140 | 598 | netdev_raw->kind = _NETDEV_KIND_INVALID; |
02b59d57 | 599 | |
326cb406 | 600 | r = config_parse(NULL, filename, file, |
aa9f1140 | 601 | "Match\0NetDev\0", |
e9f3d2d5 | 602 | config_item_perf_lookup, network_netdev_gperf_lookup, |
aa9f1140 | 603 | true, false, true, netdev_raw); |
36f822c4 | 604 | if (r < 0) |
02b59d57 | 605 | return r; |
02b59d57 | 606 | |
aa9f1140 TG |
607 | r = fseek(file, 0, SEEK_SET); |
608 | if (r < 0) | |
609 | return -errno; | |
610 | ||
2023dc8a TG |
611 | /* skip out early if configuration does not match the environment */ |
612 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, | |
aa9f1140 TG |
613 | netdev_raw->match_host, netdev_raw->match_virt, |
614 | netdev_raw->match_kernel, netdev_raw->match_arch, | |
32bc8adc | 615 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
2023dc8a TG |
616 | return 0; |
617 | ||
aa9f1140 | 618 | if (!NETDEV_VTABLE(netdev_raw)) { |
e46eab86 | 619 | log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename); |
52433f6b | 620 | return 0; |
3be1d7e0 | 621 | } |
2023dc8a | 622 | |
aa9f1140 | 623 | if (!netdev_raw->ifname) { |
1a436809 | 624 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
326cb406 SS |
625 | return 0; |
626 | } | |
627 | ||
aa9f1140 TG |
628 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); |
629 | if (!netdev) | |
630 | return log_oom(); | |
fe6b2d55 | 631 | |
aa9f1140 TG |
632 | netdev->n_ref = 1; |
633 | netdev->manager = manager; | |
634 | netdev->state = _NETDEV_STATE_INVALID; | |
635 | netdev->kind = netdev_raw->kind; | |
636 | netdev->ifname = netdev_raw->ifname; | |
326cb406 | 637 | |
aa9f1140 TG |
638 | if (NETDEV_VTABLE(netdev)->init) |
639 | NETDEV_VTABLE(netdev)->init(netdev); | |
640 | ||
641 | r = config_parse(NULL, filename, file, | |
642 | NETDEV_VTABLE(netdev)->sections, | |
643 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
644 | false, false, false, netdev); | |
645 | if (r < 0) | |
646 | return r; | |
647 | ||
648 | /* verify configuration */ | |
649 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
650 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
651 | if (r < 0) | |
652 | return 0; | |
fe6b2d55 TG |
653 | } |
654 | ||
52433f6b TG |
655 | netdev->filename = strdup(filename); |
656 | if (!netdev->filename) | |
02b59d57 TG |
657 | return log_oom(); |
658 | ||
5c8f858d TG |
659 | if (!netdev->mac) { |
660 | r = netdev_get_mac(netdev->ifname, &netdev->mac); | |
6a7a4e4d LP |
661 | if (r < 0) |
662 | return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname); | |
5c8f858d TG |
663 | } |
664 | ||
af4e9e2c | 665 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
02b59d57 TG |
666 | if (r < 0) |
667 | return r; | |
668 | ||
52433f6b | 669 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 670 | |
79008bdd | 671 | log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
3be1d7e0 | 672 | |
aa9f1140 TG |
673 | switch (NETDEV_VTABLE(netdev)->create_type) { |
674 | case NETDEV_CREATE_MASTER: | |
675 | case NETDEV_CREATE_INDEPENDENT: | |
6c3e68e7 | 676 | r = netdev_create(netdev, NULL, NULL); |
9e358851 | 677 | if (r < 0) |
1eb80875 | 678 | return 0; |
9e358851 | 679 | |
aa9f1140 TG |
680 | break; |
681 | default: | |
682 | break; | |
54abf461 | 683 | } |
02b59d57 | 684 | |
52433f6b | 685 | netdev = NULL; |
02b59d57 TG |
686 | |
687 | return 0; | |
688 | } | |
689 | ||
52433f6b | 690 | int netdev_load(Manager *manager) { |
6a7a4e4d | 691 | _cleanup_strv_free_ char **files = NULL; |
1a436809 | 692 | NetDev *netdev; |
6a7a4e4d | 693 | char **f; |
02b59d57 TG |
694 | int r; |
695 | ||
696 | assert(manager); | |
697 | ||
52433f6b | 698 | while ((netdev = hashmap_first(manager->netdevs))) |
14b746f7 | 699 | netdev_unref(netdev); |
02b59d57 | 700 | |
2ad8416d | 701 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
f647962d MS |
702 | if (r < 0) |
703 | return log_error_errno(r, "Failed to enumerate netdev files: %m"); | |
02b59d57 TG |
704 | |
705 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 706 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
707 | if (r < 0) |
708 | return r; | |
709 | } | |
710 | ||
02b59d57 TG |
711 | return 0; |
712 | } |