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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
02b59d57 | 2 | |
987efa17 | 3 | #include <net/if.h> |
f2000933 | 4 | #include <netinet/in.h> |
987efa17 | 5 | |
b5efdb8a | 6 | #include "alloc-util.h" |
02b59d57 TG |
7 | #include "conf-files.h" |
8 | #include "conf-parser.h" | |
3ffd4af2 | 9 | #include "fd-util.h" |
02b59d57 | 10 | #include "list.h" |
23f53b99 | 11 | #include "netdev/bond.h" |
3a56e697 SS |
12 | #include "netdev/bridge.h" |
13 | #include "netdev/dummy.h" | |
14 | #include "netdev/fou-tunnel.h" | |
6598e046 | 15 | #include "netdev/geneve.h" |
23f53b99 | 16 | #include "netdev/ipvlan.h" |
3a56e697 | 17 | #include "netdev/l2tp-tunnel.h" |
81962db7 | 18 | #include "netdev/macsec.h" |
3a56e697 SS |
19 | #include "netdev/macvlan.h" |
20 | #include "netdev/netdev.h" | |
21 | #include "netdev/netdevsim.h" | |
23f53b99 TG |
22 | #include "netdev/tunnel.h" |
23 | #include "netdev/tuntap.h" | |
3a56e697 | 24 | #include "netdev/vcan.h" |
23f53b99 | 25 | #include "netdev/veth.h" |
3a56e697 | 26 | #include "netdev/vlan.h" |
23f53b99 | 27 | #include "netdev/vrf.h" |
d6df583c | 28 | #include "netdev/vxcan.h" |
3a56e697 | 29 | #include "netdev/vxlan.h" |
e5719363 | 30 | #include "netdev/wireguard.h" |
3a56e697 SS |
31 | #include "netlink-util.h" |
32 | #include "network-internal.h" | |
33 | #include "networkd-link.h" | |
34 | #include "networkd-manager.h" | |
35 | #include "siphash24.h" | |
36 | #include "stat-util.h" | |
37 | #include "string-table.h" | |
38 | #include "string-util.h" | |
39 | #include "strv.h" | |
23f53b99 | 40 | |
3be1d7e0 TG |
41 | const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { |
42 | [NETDEV_KIND_BRIDGE] = &bridge_vtable, | |
43 | [NETDEV_KIND_BOND] = &bond_vtable, | |
44 | [NETDEV_KIND_VLAN] = &vlan_vtable, | |
45 | [NETDEV_KIND_MACVLAN] = &macvlan_vtable, | |
f33ff02b | 46 | [NETDEV_KIND_MACVTAP] = &macvtap_vtable, |
c4a5ddc9 | 47 | [NETDEV_KIND_IPVLAN] = &ipvlan_vtable, |
3be1d7e0 TG |
48 | [NETDEV_KIND_VXLAN] = &vxlan_vtable, |
49 | [NETDEV_KIND_IPIP] = &ipip_vtable, | |
50 | [NETDEV_KIND_GRE] = &gre_vtable, | |
1af2536a | 51 | [NETDEV_KIND_GRETAP] = &gretap_vtable, |
b16492f8 SS |
52 | [NETDEV_KIND_IP6GRE] = &ip6gre_vtable, |
53 | [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable, | |
3be1d7e0 TG |
54 | [NETDEV_KIND_SIT] = &sit_vtable, |
55 | [NETDEV_KIND_VTI] = &vti_vtable, | |
9011ce77 | 56 | [NETDEV_KIND_VTI6] = &vti6_vtable, |
3be1d7e0 TG |
57 | [NETDEV_KIND_VETH] = &veth_vtable, |
58 | [NETDEV_KIND_DUMMY] = &dummy_vtable, | |
59 | [NETDEV_KIND_TUN] = &tun_vtable, | |
60 | [NETDEV_KIND_TAP] = &tap_vtable, | |
855ee1a1 | 61 | [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable, |
20897a0d | 62 | [NETDEV_KIND_VRF] = &vrf_vtable, |
92c918b0 | 63 | [NETDEV_KIND_VCAN] = &vcan_vtable, |
6598e046 | 64 | [NETDEV_KIND_GENEVE] = &geneve_vtable, |
d6df583c | 65 | [NETDEV_KIND_VXCAN] = &vxcan_vtable, |
e5719363 | 66 | [NETDEV_KIND_WIREGUARD] = &wireguard_vtable, |
56e7fb50 | 67 | [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable, |
53cb501a | 68 | [NETDEV_KIND_FOU] = &foutnl_vtable, |
2266864b | 69 | [NETDEV_KIND_ERSPAN] = &erspan_vtable, |
3a56e697 | 70 | [NETDEV_KIND_L2TP] = &l2tptnl_vtable, |
81962db7 | 71 | [NETDEV_KIND_MACSEC] = &macsec_vtable, |
3be1d7e0 TG |
72 | }; |
73 | ||
2c5859af | 74 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
52433f6b | 75 | [NETDEV_KIND_BRIDGE] = "bridge", |
54abf461 TG |
76 | [NETDEV_KIND_BOND] = "bond", |
77 | [NETDEV_KIND_VLAN] = "vlan", | |
fe6b2d55 | 78 | [NETDEV_KIND_MACVLAN] = "macvlan", |
f33ff02b | 79 | [NETDEV_KIND_MACVTAP] = "macvtap", |
c4a5ddc9 | 80 | [NETDEV_KIND_IPVLAN] = "ipvlan", |
326cb406 | 81 | [NETDEV_KIND_VXLAN] = "vxlan", |
7951dea2 SS |
82 | [NETDEV_KIND_IPIP] = "ipip", |
83 | [NETDEV_KIND_GRE] = "gre", | |
1af2536a | 84 | [NETDEV_KIND_GRETAP] = "gretap", |
b16492f8 SS |
85 | [NETDEV_KIND_IP6GRE] = "ip6gre", |
86 | [NETDEV_KIND_IP6GRETAP] = "ip6gretap", | |
7951dea2 | 87 | [NETDEV_KIND_SIT] = "sit", |
10142d75 | 88 | [NETDEV_KIND_VETH] = "veth", |
9e358851 | 89 | [NETDEV_KIND_VTI] = "vti", |
9011ce77 | 90 | [NETDEV_KIND_VTI6] = "vti6", |
9e358851 | 91 | [NETDEV_KIND_DUMMY] = "dummy", |
30ae9dfd SS |
92 | [NETDEV_KIND_TUN] = "tun", |
93 | [NETDEV_KIND_TAP] = "tap", | |
855ee1a1 | 94 | [NETDEV_KIND_IP6TNL] = "ip6tnl", |
20897a0d | 95 | [NETDEV_KIND_VRF] = "vrf", |
92c918b0 | 96 | [NETDEV_KIND_VCAN] = "vcan", |
6598e046 | 97 | [NETDEV_KIND_GENEVE] = "geneve", |
d6df583c | 98 | [NETDEV_KIND_VXCAN] = "vxcan", |
e5719363 | 99 | [NETDEV_KIND_WIREGUARD] = "wireguard", |
56e7fb50 | 100 | [NETDEV_KIND_NETDEVSIM] = "netdevsim", |
53cb501a | 101 | [NETDEV_KIND_FOU] = "fou", |
2266864b | 102 | [NETDEV_KIND_ERSPAN] = "erspan", |
3a56e697 | 103 | [NETDEV_KIND_L2TP] = "l2tp", |
81962db7 | 104 | [NETDEV_KIND_MACSEC] = "macsec", |
52433f6b | 105 | }; |
02b59d57 | 106 | |
1a436809 | 107 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
62facba1 YW |
108 | |
109 | int config_parse_netdev_kind( | |
110 | const char *unit, | |
111 | const char *filename, | |
112 | unsigned line, | |
113 | const char *section, | |
114 | unsigned section_line, | |
115 | const char *lvalue, | |
116 | int ltype, | |
117 | const char *rvalue, | |
118 | void *data, | |
119 | void *userdata) { | |
120 | ||
121 | NetDevKind k, *kind = data; | |
122 | ||
123 | assert(rvalue); | |
124 | assert(data); | |
125 | ||
126 | k = netdev_kind_from_string(rvalue); | |
127 | if (k < 0) { | |
128 | log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse netdev kind, ignoring assignment: %s", rvalue); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | if (*kind != _NETDEV_KIND_INVALID && *kind != k) { | |
133 | log_syntax(unit, LOG_ERR, filename, line, 0, | |
134 | "Specified netdev kind is different from the previous value '%s', ignoring assignment: %s", | |
135 | netdev_kind_to_string(*kind), rvalue); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | *kind = k; | |
140 | ||
141 | return 0; | |
142 | } | |
52433f6b | 143 | |
1046bf9b | 144 | static void netdev_callbacks_clear(NetDev *netdev) { |
3f265037 | 145 | netdev_join_callback *callback; |
52433f6b | 146 | |
1046bf9b | 147 | if (!netdev) |
02b59d57 TG |
148 | return; |
149 | ||
52433f6b TG |
150 | while ((callback = netdev->callbacks)) { |
151 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
62e2d5bb | 152 | link_unref(callback->link); |
02b59d57 TG |
153 | free(callback); |
154 | } | |
59cb64e6 TG |
155 | } |
156 | ||
9e2bbf99 YW |
157 | bool netdev_is_managed(NetDev *netdev) { |
158 | if (!netdev || !netdev->manager || !netdev->ifname) | |
159 | return false; | |
160 | ||
161 | return hashmap_get(netdev->manager->netdevs, netdev->ifname) == netdev; | |
162 | } | |
163 | ||
c4397d94 YW |
164 | static void netdev_detach_from_manager(NetDev *netdev) { |
165 | if (netdev->ifname && netdev->manager) | |
166 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
c4397d94 YW |
167 | } |
168 | ||
8301aa0b YW |
169 | static NetDev *netdev_free(NetDev *netdev) { |
170 | assert(netdev); | |
59cb64e6 | 171 | |
1046bf9b | 172 | netdev_callbacks_clear(netdev); |
02b59d57 | 173 | |
c4397d94 | 174 | netdev_detach_from_manager(netdev); |
02b59d57 | 175 | |
52433f6b | 176 | free(netdev->filename); |
02b59d57 | 177 | |
52433f6b | 178 | free(netdev->description); |
af4e9e2c | 179 | free(netdev->ifname); |
96c90742 | 180 | free(netdev->mac); |
c4f58dea | 181 | condition_free_list(netdev->conditions); |
79e16ce3 | 182 | |
f3c33b23 LP |
183 | /* Invoke the per-kind done() destructor, but only if the state field is initialized. We conditionalize that |
184 | * because we parse .netdev files twice: once to determine the kind (with a short, minimal NetDev structure | |
185 | * allocation, with no room for per-kind fields), and once to read the kind's properties (with a full, | |
186 | * comprehensive NetDev structure allocation with enough space for whatever the specific kind needs). Now, in | |
187 | * the first case we shouldn't try to destruct the per-kind NetDev fields on destruction, in the second case we | |
188 | * should. We use the state field to discern the two cases: it's _NETDEV_STATE_INVALID on the first "raw" | |
189 | * call. */ | |
190 | if (netdev->state != _NETDEV_STATE_INVALID && | |
191 | NETDEV_VTABLE(netdev) && | |
aa9f1140 TG |
192 | NETDEV_VTABLE(netdev)->done) |
193 | NETDEV_VTABLE(netdev)->done(netdev); | |
194 | ||
8301aa0b | 195 | return mfree(netdev); |
14b746f7 TG |
196 | } |
197 | ||
8301aa0b | 198 | DEFINE_TRIVIAL_REF_UNREF_FUNC(NetDev, netdev, netdev_free); |
14b746f7 | 199 | |
2cc7e981 TG |
200 | void netdev_drop(NetDev *netdev) { |
201 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
202 | return; | |
203 | ||
204 | netdev->state = NETDEV_STATE_LINGER; | |
205 | ||
79008bdd | 206 | log_netdev_debug(netdev, "netdev removed"); |
370e9930 | 207 | |
1046bf9b | 208 | netdev_callbacks_clear(netdev); |
2cc7e981 | 209 | |
c4397d94 YW |
210 | netdev_detach_from_manager(netdev); |
211 | ||
2cc7e981 TG |
212 | netdev_unref(netdev); |
213 | ||
214 | return; | |
215 | } | |
216 | ||
1a436809 TG |
217 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
218 | NetDev *netdev; | |
02b59d57 TG |
219 | |
220 | assert(manager); | |
221 | assert(name); | |
222 | assert(ret); | |
223 | ||
52433f6b TG |
224 | netdev = hashmap_get(manager->netdevs, name); |
225 | if (!netdev) { | |
02b59d57 TG |
226 | *ret = NULL; |
227 | return -ENOENT; | |
228 | } | |
229 | ||
52433f6b | 230 | *ret = netdev; |
02b59d57 TG |
231 | |
232 | return 0; | |
233 | } | |
234 | ||
1a436809 | 235 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 236 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 | 237 | |
1046bf9b | 238 | netdev_callbacks_clear(netdev); |
62e2d5bb | 239 | |
02b59d57 TG |
240 | return 0; |
241 | } | |
242 | ||
302a796f | 243 | static int netdev_enslave_ready(NetDev *netdev, Link* link, link_netlink_message_handler_t callback) { |
4afd3348 | 244 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
02b59d57 TG |
245 | int r; |
246 | ||
52433f6b TG |
247 | assert(netdev); |
248 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
249 | assert(netdev->manager); |
250 | assert(netdev->manager->rtnl); | |
6cb955c6 | 251 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF)); |
02b59d57 TG |
252 | assert(link); |
253 | assert(callback); | |
254 | ||
4c387986 | 255 | if (link->flags & IFF_UP && netdev->kind == NETDEV_KIND_BOND) { |
14b6bb77 | 256 | log_netdev_debug(netdev, "Link '%s' was up when attempting to enslave it. Bringing link down.", link->ifname); |
8e54db83 | 257 | r = link_down(link, NULL); |
14b6bb77 RW |
258 | if (r < 0) |
259 | return log_netdev_error_errno(netdev, r, "Could not bring link down: %m"); | |
260 | } | |
261 | ||
6a7a4e4d LP |
262 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
263 | if (r < 0) | |
264 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m"); | |
02b59d57 | 265 | |
1c4baffc | 266 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
6a7a4e4d LP |
267 | if (r < 0) |
268 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m"); | |
02b59d57 | 269 | |
302a796f YW |
270 | r = netlink_call_async(netdev->manager->rtnl, NULL, req, callback, |
271 | link_netlink_destroy_callback, link); | |
6a7a4e4d | 272 | if (r < 0) |
b8b846d7 | 273 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); |
02b59d57 | 274 | |
563c69c6 TG |
275 | link_ref(link); |
276 | ||
6a7a4e4d | 277 | log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname); |
ab47d620 | 278 | |
02b59d57 TG |
279 | return 0; |
280 | } | |
281 | ||
1a436809 | 282 | static int netdev_enter_ready(NetDev *netdev) { |
3f265037 | 283 | netdev_join_callback *callback, *callback_next; |
ad0774e6 | 284 | int r; |
02b59d57 | 285 | |
52433f6b | 286 | assert(netdev); |
af4e9e2c | 287 | assert(netdev->ifname); |
924fe430 | 288 | |
ba5596ec TG |
289 | if (netdev->state != NETDEV_STATE_CREATING) |
290 | return 0; | |
291 | ||
52433f6b | 292 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 293 | |
98b32556 | 294 | log_netdev_info(netdev, "netdev ready"); |
02b59d57 | 295 | |
ad0774e6 | 296 | LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) { |
b226d99b | 297 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 298 | * link was ready */ |
ad0774e6 TG |
299 | r = netdev_enslave_ready(netdev, callback->link, callback->callback); |
300 | if (r < 0) | |
301 | return r; | |
302 | ||
303 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
304 | link_unref(callback->link); | |
305 | free(callback); | |
02b59d57 TG |
306 | } |
307 | ||
540eb5f0 SS |
308 | if (NETDEV_VTABLE(netdev)->post_create) |
309 | NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL); | |
310 | ||
02b59d57 TG |
311 | return 0; |
312 | } | |
8469c1d3 | 313 | |
d5b3d845 | 314 | /* callback for netdev's created without a backing Link */ |
302a796f | 315 | static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { |
172f6635 | 316 | int r; |
02b59d57 | 317 | |
1046bf9b | 318 | assert(netdev); |
52433f6b | 319 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 | 320 | |
1c4baffc | 321 | r = sd_netlink_message_get_errno(m); |
e09826dc | 322 | if (r == -EEXIST) |
98b32556 | 323 | log_netdev_info(netdev, "netdev exists, using existing without changing its parameters"); |
505f8da7 | 324 | else if (r < 0) { |
6a7a4e4d | 325 | log_netdev_warning_errno(netdev, r, "netdev could not be created: %m"); |
37ebeb77 | 326 | netdev_drop(netdev); |
dd3efc09 TG |
327 | |
328 | return 1; | |
02b59d57 TG |
329 | } |
330 | ||
6a7a4e4d | 331 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 332 | |
dd3efc09 | 333 | return 1; |
02b59d57 TG |
334 | } |
335 | ||
302a796f | 336 | static int netdev_enslave(NetDev *netdev, Link *link, link_netlink_message_handler_t callback) { |
b226d99b TG |
337 | int r; |
338 | ||
3f265037 | 339 | assert(netdev); |
62e2d5bb TG |
340 | assert(netdev->manager); |
341 | assert(netdev->manager->rtnl); | |
6cb955c6 | 342 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF)); |
7951dea2 | 343 | |
52433f6b | 344 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
345 | r = netdev_enslave_ready(netdev, link, callback); |
346 | if (r < 0) | |
347 | return r; | |
62e2d5bb | 348 | } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) { |
4afd3348 | 349 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
62e2d5bb | 350 | |
05d0c2e3 | 351 | r = rtnl_message_new_synthetic_error(netdev->manager->rtnl, -ENODEV, 0, &m); |
62e2d5bb TG |
352 | if (r >= 0) |
353 | callback(netdev->manager->rtnl, m, link); | |
02b59d57 | 354 | } else { |
d076c6f9 | 355 | /* the netdev is not yet read, save this request for when it is */ |
3f265037 | 356 | netdev_join_callback *cb; |
02b59d57 | 357 | |
17f9c355 | 358 | cb = new(netdev_join_callback, 1); |
02b59d57 TG |
359 | if (!cb) |
360 | return log_oom(); | |
361 | ||
17f9c355 YW |
362 | *cb = (netdev_join_callback) { |
363 | .callback = callback, | |
364 | .link = link_ref(link), | |
365 | }; | |
02b59d57 | 366 | |
52433f6b | 367 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
3be1d7e0 | 368 | |
6a7a4e4d | 369 | log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname); |
aa9f1140 | 370 | } |
3f265037 TG |
371 | |
372 | return 0; | |
373 | } | |
374 | ||
1c4baffc | 375 | int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) { |
c3ebdce3 | 376 | uint16_t type; |
d39edfc7 | 377 | const char *kind; |
ca4e095a LP |
378 | const char *received_kind; |
379 | const char *received_name; | |
d39edfc7 TG |
380 | int r, ifindex; |
381 | ||
50add290 | 382 | assert(netdev); |
c3ebdce3 | 383 | assert(message); |
02b59d57 | 384 | |
1c4baffc | 385 | r = sd_netlink_message_get_type(message, &type); |
6a7a4e4d LP |
386 | if (r < 0) |
387 | return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m"); | |
c3ebdce3 | 388 | |
ba5596ec | 389 | if (type != RTM_NEWLINK) { |
6a7a4e4d | 390 | log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type."); |
c3ebdce3 | 391 | return -EINVAL; |
ba5596ec | 392 | } |
d39edfc7 | 393 | |
a21df104 TG |
394 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
395 | if (r < 0) { | |
6a7a4e4d | 396 | log_netdev_error_errno(netdev, r, "Could not get ifindex: %m"); |
a21df104 TG |
397 | netdev_enter_failed(netdev); |
398 | return r; | |
399 | } else if (ifindex <= 0) { | |
79008bdd | 400 | log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex); |
a21df104 | 401 | netdev_enter_failed(netdev); |
6a7a4e4d | 402 | return -EINVAL; |
a21df104 TG |
403 | } |
404 | ||
a21df104 TG |
405 | if (netdev->ifindex > 0) { |
406 | if (netdev->ifindex != ifindex) { | |
79008bdd | 407 | log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d", |
a21df104 TG |
408 | ifindex, netdev->ifindex); |
409 | netdev_enter_failed(netdev); | |
410 | return -EEXIST; | |
411 | } else | |
412 | /* ifindex already set to the same for this netdev */ | |
413 | return 0; | |
414 | } | |
415 | ||
1c4baffc | 416 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name); |
6a7a4e4d LP |
417 | if (r < 0) |
418 | return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m"); | |
c6315a7a | 419 | |
af4e9e2c | 420 | if (!streq(netdev->ifname, received_name)) { |
6a7a4e4d | 421 | log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name); |
c6315a7a TG |
422 | netdev_enter_failed(netdev); |
423 | return r; | |
424 | } | |
425 | ||
1c4baffc | 426 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); |
6a7a4e4d LP |
427 | if (r < 0) |
428 | return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m"); | |
d39edfc7 | 429 | |
1c4baffc | 430 | r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind); |
6a7a4e4d LP |
431 | if (r < 0) |
432 | return log_netdev_error_errno(netdev, r, "Could not get KIND: %m"); | |
d39edfc7 | 433 | |
1c4baffc | 434 | r = sd_netlink_message_exit_container(message); |
6a7a4e4d LP |
435 | if (r < 0) |
436 | return log_netdev_error_errno(netdev, r, "Could not exit container: %m"); | |
505f8da7 | 437 | |
30ae9dfd SS |
438 | if (netdev->kind == NETDEV_KIND_TAP) |
439 | /* the kernel does not distinguish between tun and tap */ | |
440 | kind = "tun"; | |
441 | else { | |
442 | kind = netdev_kind_to_string(netdev->kind); | |
443 | if (!kind) { | |
79008bdd | 444 | log_netdev_error(netdev, "Could not get kind"); |
30ae9dfd SS |
445 | netdev_enter_failed(netdev); |
446 | return -EINVAL; | |
447 | } | |
c3ebdce3 TG |
448 | } |
449 | ||
d39edfc7 | 450 | if (!streq(kind, received_kind)) { |
79008bdd | 451 | log_netdev_error(netdev, |
30ae9dfd | 452 | "Received newlink with wrong KIND %s, " |
c6315a7a | 453 | "expected %s", received_kind, kind); |
d39edfc7 TG |
454 | netdev_enter_failed(netdev); |
455 | return r; | |
456 | } | |
457 | ||
50add290 | 458 | netdev->ifindex = ifindex; |
52433f6b | 459 | |
79008bdd | 460 | log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex); |
5261692f | 461 | |
52433f6b | 462 | netdev_enter_ready(netdev); |
02b59d57 TG |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
5c8f858d TG |
467 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
468 | ||
3be1d7e0 | 469 | int netdev_get_mac(const char *ifname, struct ether_addr **ret) { |
5c8f858d | 470 | _cleanup_free_ struct ether_addr *mac = NULL; |
dbe81cbd | 471 | uint64_t result; |
5c8f858d TG |
472 | size_t l, sz; |
473 | uint8_t *v; | |
474 | int r; | |
475 | ||
476 | assert(ifname); | |
477 | assert(ret); | |
478 | ||
479 | mac = new0(struct ether_addr, 1); | |
480 | if (!mac) | |
481 | return -ENOMEM; | |
482 | ||
483 | l = strlen(ifname); | |
484 | sz = sizeof(sd_id128_t) + l; | |
6e9417f5 | 485 | v = newa(uint8_t, sz); |
5c8f858d TG |
486 | |
487 | /* fetch some persistent data unique to the machine */ | |
488 | r = sd_id128_get_machine((sd_id128_t*) v); | |
489 | if (r < 0) | |
490 | return r; | |
491 | ||
492 | /* combine with some data unique (on this machine) to this | |
493 | * netdev */ | |
494 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
495 | ||
496 | /* Let's hash the host machine ID plus the container name. We | |
497 | * use a fixed, but originally randomly created hash key here. */ | |
933f9cae | 498 | result = siphash24(v, sz, HASH_KEY.bytes); |
5c8f858d TG |
499 | |
500 | assert_cc(ETH_ALEN <= sizeof(result)); | |
dbe81cbd | 501 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
5c8f858d TG |
502 | |
503 | /* see eth_random_addr in the kernel */ | |
504 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
505 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
506 | ||
ae2a15bc | 507 | *ret = TAKE_PTR(mac); |
5c8f858d TG |
508 | |
509 | return 0; | |
510 | } | |
511 | ||
302a796f | 512 | static int netdev_create(NetDev *netdev, Link *link, link_netlink_message_handler_t callback) { |
aa9f1140 TG |
513 | int r; |
514 | ||
515 | assert(netdev); | |
6c3e68e7 | 516 | assert(!link || callback); |
aa9f1140 TG |
517 | |
518 | /* create netdev */ | |
519 | if (NETDEV_VTABLE(netdev)->create) { | |
6c3e68e7 TG |
520 | assert(!link); |
521 | ||
aa9f1140 TG |
522 | r = NETDEV_VTABLE(netdev)->create(netdev); |
523 | if (r < 0) | |
524 | return r; | |
525 | ||
6a7a4e4d | 526 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 527 | } else { |
4afd3348 | 528 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
aa9f1140 TG |
529 | |
530 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
6a7a4e4d LP |
531 | if (r < 0) |
532 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m"); | |
aa9f1140 | 533 | |
1c4baffc | 534 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); |
6a7a4e4d LP |
535 | if (r < 0) |
536 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m"); | |
aa9f1140 TG |
537 | |
538 | if (netdev->mac) { | |
1c4baffc | 539 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); |
6a7a4e4d LP |
540 | if (r < 0) |
541 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m"); | |
aa9f1140 TG |
542 | } |
543 | ||
544 | if (netdev->mtu) { | |
1c4baffc | 545 | r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); |
6a7a4e4d LP |
546 | if (r < 0) |
547 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m"); | |
aa9f1140 TG |
548 | } |
549 | ||
550 | if (link) { | |
1c4baffc | 551 | r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex); |
6a7a4e4d LP |
552 | if (r < 0) |
553 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m"); | |
aa9f1140 TG |
554 | } |
555 | ||
1c4baffc | 556 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
6a7a4e4d LP |
557 | if (r < 0) |
558 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 559 | |
1c4baffc | 560 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); |
6a7a4e4d LP |
561 | if (r < 0) |
562 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); | |
aa9f1140 TG |
563 | |
564 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
565 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
566 | if (r < 0) | |
567 | return r; | |
568 | } | |
569 | ||
1c4baffc | 570 | r = sd_netlink_message_close_container(m); |
6a7a4e4d | 571 | if (r < 0) |
9b53e129 | 572 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); |
aa9f1140 | 573 | |
1c4baffc | 574 | r = sd_netlink_message_close_container(m); |
6a7a4e4d LP |
575 | if (r < 0) |
576 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 577 | |
6c3e68e7 | 578 | if (link) { |
302a796f YW |
579 | r = netlink_call_async(netdev->manager->rtnl, NULL, m, callback, |
580 | link_netlink_destroy_callback, link); | |
6a7a4e4d LP |
581 | if (r < 0) |
582 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
aa9f1140 | 583 | |
6c3e68e7 TG |
584 | link_ref(link); |
585 | } else { | |
302a796f YW |
586 | r = netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler, |
587 | netdev_destroy_callback, netdev); | |
6a7a4e4d LP |
588 | if (r < 0) |
589 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
6c3e68e7 TG |
590 | |
591 | netdev_ref(netdev); | |
592 | } | |
aa9f1140 TG |
593 | |
594 | netdev->state = NETDEV_STATE_CREATING; | |
595 | ||
6a7a4e4d | 596 | log_netdev_debug(netdev, "Creating"); |
aa9f1140 TG |
597 | } |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
7033af49 YW |
602 | static int netdev_create_after_configured(NetDev *netdev, Link *link) { |
603 | assert(netdev); | |
604 | assert(link); | |
605 | assert(NETDEV_VTABLE(netdev)->create_after_configured); | |
606 | ||
607 | return NETDEV_VTABLE(netdev)->create_after_configured(netdev, link); | |
608 | } | |
609 | ||
aa9f1140 | 610 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ |
302a796f | 611 | int netdev_join(NetDev *netdev, Link *link, link_netlink_message_handler_t callback) { |
aa9f1140 TG |
612 | int r; |
613 | ||
614 | assert(netdev); | |
615 | assert(netdev->manager); | |
616 | assert(netdev->manager->rtnl); | |
aa9f1140 | 617 | |
859e9c04 | 618 | switch (netdev_get_create_type(netdev)) { |
aa9f1140 TG |
619 | case NETDEV_CREATE_MASTER: |
620 | r = netdev_enslave(netdev, link, callback); | |
621 | if (r < 0) | |
622 | return r; | |
623 | ||
624 | break; | |
625 | case NETDEV_CREATE_STACKED: | |
6c3e68e7 | 626 | r = netdev_create(netdev, link, callback); |
aa9f1140 TG |
627 | if (r < 0) |
628 | return r; | |
629 | ||
630 | break; | |
7033af49 YW |
631 | case NETDEV_CREATE_AFTER_CONFIGURED: |
632 | r = netdev_create_after_configured(netdev, link); | |
633 | if (r < 0) | |
634 | return r; | |
635 | break; | |
aa9f1140 TG |
636 | default: |
637 | assert_not_reached("Can not join independent netdev"); | |
638 | } | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
e27aac11 | 643 | int netdev_load_one(Manager *manager, const char *filename) { |
8e766630 | 644 | _cleanup_(netdev_unrefp) NetDev *netdev_raw = NULL, *netdev = NULL; |
02b59d57 | 645 | _cleanup_fclose_ FILE *file = NULL; |
2cc34d5b | 646 | const char *dropin_dirname; |
4d7fa6de | 647 | bool independent = false; |
02b59d57 TG |
648 | int r; |
649 | ||
bf1bc670 TA |
650 | assert(manager); |
651 | assert(filename); | |
652 | ||
02b59d57 TG |
653 | file = fopen(filename, "re"); |
654 | if (!file) { | |
655 | if (errno == ENOENT) | |
656 | return 0; | |
f3c33b23 LP |
657 | |
658 | return -errno; | |
02b59d57 TG |
659 | } |
660 | ||
ed88bcfb ZJS |
661 | if (null_or_empty_fd(fileno(file))) { |
662 | log_debug("Skipping empty file: %s", filename); | |
663 | return 0; | |
664 | } | |
665 | ||
17f9c355 | 666 | netdev_raw = new(NetDev, 1); |
aa9f1140 | 667 | if (!netdev_raw) |
02b59d57 TG |
668 | return log_oom(); |
669 | ||
17f9c355 YW |
670 | *netdev_raw = (NetDev) { |
671 | .n_ref = 1, | |
672 | .kind = _NETDEV_KIND_INVALID, | |
673 | .state = _NETDEV_STATE_INVALID, /* an invalid state means done() of the implementation won't be called on destruction */ | |
674 | }; | |
02b59d57 | 675 | |
281bb5c1 | 676 | dropin_dirname = strjoina(basename(filename), ".d"); |
dc0d4078 | 677 | r = config_parse_many(filename, NETWORK_DIRS, dropin_dirname, |
2cc34d5b ZJS |
678 | "Match\0NetDev\0", |
679 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
5360d771 | 680 | CONFIG_PARSE_WARN|CONFIG_PARSE_RELAXED, netdev_raw); |
36f822c4 | 681 | if (r < 0) |
02b59d57 | 682 | return r; |
02b59d57 | 683 | |
2023dc8a | 684 | /* skip out early if configuration does not match the environment */ |
c4f58dea | 685 | if (!condition_test_list(netdev_raw->conditions, NULL, NULL, NULL)) { |
a6779fec | 686 | log_debug("%s: Conditions in the file do not match the system environment, skipping.", filename); |
2023dc8a | 687 | return 0; |
a6779fec | 688 | } |
2023dc8a | 689 | |
2f27e2c5 | 690 | if (netdev_raw->kind == _NETDEV_KIND_INVALID) { |
c6e77d7b | 691 | log_warning("NetDev has no Kind= configured in %s. Ignoring", filename); |
52433f6b | 692 | return 0; |
3be1d7e0 | 693 | } |
2023dc8a | 694 | |
aa9f1140 | 695 | if (!netdev_raw->ifname) { |
c6e77d7b | 696 | log_warning("NetDev without Name= configured in %s. Ignoring", filename); |
326cb406 SS |
697 | return 0; |
698 | } | |
699 | ||
281bb5c1 ZJS |
700 | r = fseek(file, 0, SEEK_SET); |
701 | if (r < 0) | |
702 | return -errno; | |
703 | ||
aa9f1140 TG |
704 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); |
705 | if (!netdev) | |
706 | return log_oom(); | |
fe6b2d55 | 707 | |
aa9f1140 TG |
708 | netdev->n_ref = 1; |
709 | netdev->manager = manager; | |
aa9f1140 | 710 | netdev->kind = netdev_raw->kind; |
c6e77d7b YW |
711 | netdev->state = NETDEV_STATE_LOADING; /* we initialize the state here for the first time, |
712 | so that done() will be called on destruction */ | |
326cb406 | 713 | |
aa9f1140 TG |
714 | if (NETDEV_VTABLE(netdev)->init) |
715 | NETDEV_VTABLE(netdev)->init(netdev); | |
716 | ||
dc0d4078 | 717 | r = config_parse_many(filename, NETWORK_DIRS, dropin_dirname, |
6ce611e5 YW |
718 | NETDEV_VTABLE(netdev)->sections, |
719 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
720 | CONFIG_PARSE_WARN, netdev); | |
aa9f1140 TG |
721 | if (r < 0) |
722 | return r; | |
723 | ||
724 | /* verify configuration */ | |
725 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
726 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
727 | if (r < 0) | |
728 | return 0; | |
fe6b2d55 TG |
729 | } |
730 | ||
52433f6b TG |
731 | netdev->filename = strdup(filename); |
732 | if (!netdev->filename) | |
02b59d57 TG |
733 | return log_oom(); |
734 | ||
bc48c51f | 735 | if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) { |
5c8f858d | 736 | r = netdev_get_mac(netdev->ifname, &netdev->mac); |
6a7a4e4d | 737 | if (r < 0) |
c6e77d7b YW |
738 | return log_netdev_error_errno(netdev, r, |
739 | "Failed to generate predictable MAC address for %s: %m", | |
740 | netdev->ifname); | |
5c8f858d TG |
741 | } |
742 | ||
3e570042 YW |
743 | r = hashmap_ensure_allocated(&netdev->manager->netdevs, &string_hash_ops); |
744 | if (r < 0) | |
745 | return r; | |
746 | ||
af4e9e2c | 747 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
b519908c YW |
748 | if (r == -EEXIST) { |
749 | NetDev *n = hashmap_get(netdev->manager->netdevs, netdev->ifname); | |
750 | ||
751 | assert(n); | |
752 | log_netdev_warning_errno(netdev, r, | |
753 | "The setting Name=%s in %s conflicts with the one in %s, ignoring", | |
754 | netdev->ifname, netdev->filename, n->filename); | |
755 | ||
756 | /* Clear ifname before netdev_free() is called. Otherwise, the NetDev object 'n' is | |
757 | * removed from the hashmap 'manager->netdevs'. */ | |
758 | netdev->ifname = mfree(netdev->ifname); | |
759 | return 0; | |
760 | } | |
02b59d57 TG |
761 | if (r < 0) |
762 | return r; | |
763 | ||
52433f6b | 764 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 765 | |
79008bdd | 766 | log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
3be1d7e0 | 767 | |
859e9c04 | 768 | if (IN_SET(netdev_get_create_type(netdev), NETDEV_CREATE_MASTER, NETDEV_CREATE_INDEPENDENT)) { |
6c3e68e7 | 769 | r = netdev_create(netdev, NULL, NULL); |
9e358851 | 770 | if (r < 0) |
4d7fa6de | 771 | return r; |
4d7fa6de | 772 | } |
9e358851 | 773 | |
4d7fa6de SS |
774 | switch (netdev->kind) { |
775 | case NETDEV_KIND_IPIP: | |
776 | independent = IPIP(netdev)->independent; | |
777 | break; | |
778 | case NETDEV_KIND_GRE: | |
779 | independent = GRE(netdev)->independent; | |
780 | break; | |
781 | case NETDEV_KIND_GRETAP: | |
782 | independent = GRETAP(netdev)->independent; | |
783 | break; | |
784 | case NETDEV_KIND_IP6GRE: | |
785 | independent = IP6GRE(netdev)->independent; | |
786 | break; | |
787 | case NETDEV_KIND_IP6GRETAP: | |
788 | independent = IP6GRETAP(netdev)->independent; | |
789 | break; | |
790 | case NETDEV_KIND_SIT: | |
791 | independent = SIT(netdev)->independent; | |
792 | break; | |
793 | case NETDEV_KIND_VTI: | |
794 | independent = VTI(netdev)->independent; | |
795 | break; | |
796 | case NETDEV_KIND_VTI6: | |
797 | independent = VTI6(netdev)->independent; | |
798 | break; | |
799 | case NETDEV_KIND_IP6TNL: | |
800 | independent = IP6TNL(netdev)->independent; | |
aa9f1140 | 801 | break; |
9282f75b YW |
802 | case NETDEV_KIND_ERSPAN: |
803 | independent = ERSPAN(netdev)->independent; | |
804 | break; | |
aa9f1140 TG |
805 | default: |
806 | break; | |
54abf461 | 807 | } |
02b59d57 | 808 | |
4d7fa6de SS |
809 | if (independent) { |
810 | r = netdev_create(netdev, NULL, NULL); | |
811 | if (r < 0) | |
812 | return r; | |
813 | } | |
814 | ||
52433f6b | 815 | netdev = NULL; |
02b59d57 TG |
816 | |
817 | return 0; | |
818 | } | |
819 | ||
52433f6b | 820 | int netdev_load(Manager *manager) { |
6a7a4e4d | 821 | _cleanup_strv_free_ char **files = NULL; |
6a7a4e4d | 822 | char **f; |
02b59d57 TG |
823 | int r; |
824 | ||
825 | assert(manager); | |
826 | ||
c6dbb5c4 | 827 | hashmap_clear_with_destructor(manager->netdevs, netdev_unref); |
02b59d57 | 828 | |
dc0d4078 | 829 | r = conf_files_list_strv(&files, ".netdev", NULL, 0, NETWORK_DIRS); |
f647962d MS |
830 | if (r < 0) |
831 | return log_error_errno(r, "Failed to enumerate netdev files: %m"); | |
02b59d57 | 832 | |
b519908c | 833 | STRV_FOREACH(f, files) { |
52433f6b | 834 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
835 | if (r < 0) |
836 | return r; | |
837 | } | |
838 | ||
02b59d57 TG |
839 | return 0; |
840 | } |