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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
02b59d57 | 2 | |
987efa17 TG |
3 | #include <net/if.h> |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
02b59d57 TG |
6 | #include "conf-files.h" |
7 | #include "conf-parser.h" | |
3ffd4af2 | 8 | #include "fd-util.h" |
02b59d57 | 9 | #include "list.h" |
fc2f9534 LP |
10 | #include "netlink-util.h" |
11 | #include "network-internal.h" | |
441e9ae4 | 12 | #include "netdev/netdev.h" |
23f53b99 | 13 | #include "networkd-manager.h" |
14b6bb77 | 14 | #include "networkd-link.h" |
07630cea | 15 | #include "siphash24.h" |
8fcde012 | 16 | #include "stat-util.h" |
8b43440b | 17 | #include "string-table.h" |
07630cea | 18 | #include "string-util.h" |
51517f9e | 19 | #include "strv.h" |
02b59d57 | 20 | |
23f53b99 TG |
21 | #include "netdev/bridge.h" |
22 | #include "netdev/bond.h" | |
6598e046 | 23 | #include "netdev/geneve.h" |
23f53b99 TG |
24 | #include "netdev/vlan.h" |
25 | #include "netdev/macvlan.h" | |
26 | #include "netdev/ipvlan.h" | |
27 | #include "netdev/vxlan.h" | |
28 | #include "netdev/tunnel.h" | |
29 | #include "netdev/tuntap.h" | |
30 | #include "netdev/veth.h" | |
31 | #include "netdev/dummy.h" | |
32 | #include "netdev/vrf.h" | |
33 | #include "netdev/vcan.h" | |
d6df583c | 34 | #include "netdev/vxcan.h" |
e5719363 | 35 | #include "netdev/wireguard.h" |
56e7fb50 | 36 | #include "netdev/netdevsim.h" |
23f53b99 | 37 | |
3be1d7e0 TG |
38 | const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { |
39 | [NETDEV_KIND_BRIDGE] = &bridge_vtable, | |
40 | [NETDEV_KIND_BOND] = &bond_vtable, | |
41 | [NETDEV_KIND_VLAN] = &vlan_vtable, | |
42 | [NETDEV_KIND_MACVLAN] = &macvlan_vtable, | |
f33ff02b | 43 | [NETDEV_KIND_MACVTAP] = &macvtap_vtable, |
c4a5ddc9 | 44 | [NETDEV_KIND_IPVLAN] = &ipvlan_vtable, |
3be1d7e0 TG |
45 | [NETDEV_KIND_VXLAN] = &vxlan_vtable, |
46 | [NETDEV_KIND_IPIP] = &ipip_vtable, | |
47 | [NETDEV_KIND_GRE] = &gre_vtable, | |
1af2536a | 48 | [NETDEV_KIND_GRETAP] = &gretap_vtable, |
b16492f8 SS |
49 | [NETDEV_KIND_IP6GRE] = &ip6gre_vtable, |
50 | [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable, | |
3be1d7e0 TG |
51 | [NETDEV_KIND_SIT] = &sit_vtable, |
52 | [NETDEV_KIND_VTI] = &vti_vtable, | |
9011ce77 | 53 | [NETDEV_KIND_VTI6] = &vti6_vtable, |
3be1d7e0 TG |
54 | [NETDEV_KIND_VETH] = &veth_vtable, |
55 | [NETDEV_KIND_DUMMY] = &dummy_vtable, | |
56 | [NETDEV_KIND_TUN] = &tun_vtable, | |
57 | [NETDEV_KIND_TAP] = &tap_vtable, | |
855ee1a1 | 58 | [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable, |
20897a0d | 59 | [NETDEV_KIND_VRF] = &vrf_vtable, |
92c918b0 | 60 | [NETDEV_KIND_VCAN] = &vcan_vtable, |
6598e046 | 61 | [NETDEV_KIND_GENEVE] = &geneve_vtable, |
d6df583c | 62 | [NETDEV_KIND_VXCAN] = &vxcan_vtable, |
e5719363 | 63 | [NETDEV_KIND_WIREGUARD] = &wireguard_vtable, |
56e7fb50 | 64 | [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable, |
3be1d7e0 TG |
65 | }; |
66 | ||
2c5859af | 67 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
52433f6b | 68 | [NETDEV_KIND_BRIDGE] = "bridge", |
54abf461 TG |
69 | [NETDEV_KIND_BOND] = "bond", |
70 | [NETDEV_KIND_VLAN] = "vlan", | |
fe6b2d55 | 71 | [NETDEV_KIND_MACVLAN] = "macvlan", |
f33ff02b | 72 | [NETDEV_KIND_MACVTAP] = "macvtap", |
c4a5ddc9 | 73 | [NETDEV_KIND_IPVLAN] = "ipvlan", |
326cb406 | 74 | [NETDEV_KIND_VXLAN] = "vxlan", |
7951dea2 SS |
75 | [NETDEV_KIND_IPIP] = "ipip", |
76 | [NETDEV_KIND_GRE] = "gre", | |
1af2536a | 77 | [NETDEV_KIND_GRETAP] = "gretap", |
b16492f8 SS |
78 | [NETDEV_KIND_IP6GRE] = "ip6gre", |
79 | [NETDEV_KIND_IP6GRETAP] = "ip6gretap", | |
7951dea2 | 80 | [NETDEV_KIND_SIT] = "sit", |
10142d75 | 81 | [NETDEV_KIND_VETH] = "veth", |
9e358851 | 82 | [NETDEV_KIND_VTI] = "vti", |
9011ce77 | 83 | [NETDEV_KIND_VTI6] = "vti6", |
9e358851 | 84 | [NETDEV_KIND_DUMMY] = "dummy", |
30ae9dfd SS |
85 | [NETDEV_KIND_TUN] = "tun", |
86 | [NETDEV_KIND_TAP] = "tap", | |
855ee1a1 | 87 | [NETDEV_KIND_IP6TNL] = "ip6tnl", |
20897a0d | 88 | [NETDEV_KIND_VRF] = "vrf", |
92c918b0 | 89 | [NETDEV_KIND_VCAN] = "vcan", |
6598e046 | 90 | [NETDEV_KIND_GENEVE] = "geneve", |
d6df583c | 91 | [NETDEV_KIND_VXCAN] = "vxcan", |
e5719363 | 92 | [NETDEV_KIND_WIREGUARD] = "wireguard", |
56e7fb50 | 93 | [NETDEV_KIND_NETDEVSIM] = "netdevsim", |
52433f6b | 94 | }; |
02b59d57 | 95 | |
1a436809 TG |
96 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
97 | DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind"); | |
52433f6b | 98 | |
59cb64e6 | 99 | static void netdev_cancel_callbacks(NetDev *netdev) { |
4afd3348 | 100 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
3f265037 | 101 | netdev_join_callback *callback; |
52433f6b | 102 | |
22699541 | 103 | if (!netdev || !netdev->manager) |
02b59d57 TG |
104 | return; |
105 | ||
05d0c2e3 | 106 | rtnl_message_new_synthetic_error(netdev->manager->rtnl, -ENODEV, 0, &m); |
59cb64e6 | 107 | |
52433f6b | 108 | while ((callback = netdev->callbacks)) { |
59cb64e6 TG |
109 | if (m) { |
110 | assert(callback->link); | |
111 | assert(callback->callback); | |
112 | assert(netdev->manager); | |
113 | assert(netdev->manager->rtnl); | |
114 | ||
b024a9cf | 115 | callback->callback(netdev->manager->rtnl, m, callback->link); |
59cb64e6 TG |
116 | } |
117 | ||
52433f6b | 118 | LIST_REMOVE(callbacks, netdev->callbacks, callback); |
62e2d5bb | 119 | link_unref(callback->link); |
02b59d57 TG |
120 | free(callback); |
121 | } | |
59cb64e6 TG |
122 | } |
123 | ||
124 | static void netdev_free(NetDev *netdev) { | |
125 | if (!netdev) | |
126 | return; | |
127 | ||
128 | netdev_cancel_callbacks(netdev); | |
02b59d57 | 129 | |
281bb5c1 | 130 | if (netdev->ifname && netdev->manager) |
af4e9e2c | 131 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); |
02b59d57 | 132 | |
52433f6b | 133 | free(netdev->filename); |
02b59d57 | 134 | |
52433f6b | 135 | free(netdev->description); |
af4e9e2c | 136 | free(netdev->ifname); |
96c90742 | 137 | free(netdev->mac); |
02b59d57 | 138 | |
79e16ce3 LP |
139 | condition_free_list(netdev->match_host); |
140 | condition_free_list(netdev->match_virt); | |
5022f08a LP |
141 | condition_free_list(netdev->match_kernel_cmdline); |
142 | condition_free_list(netdev->match_kernel_version); | |
79e16ce3 LP |
143 | condition_free_list(netdev->match_arch); |
144 | ||
f3c33b23 LP |
145 | /* Invoke the per-kind done() destructor, but only if the state field is initialized. We conditionalize that |
146 | * because we parse .netdev files twice: once to determine the kind (with a short, minimal NetDev structure | |
147 | * allocation, with no room for per-kind fields), and once to read the kind's properties (with a full, | |
148 | * comprehensive NetDev structure allocation with enough space for whatever the specific kind needs). Now, in | |
149 | * the first case we shouldn't try to destruct the per-kind NetDev fields on destruction, in the second case we | |
150 | * should. We use the state field to discern the two cases: it's _NETDEV_STATE_INVALID on the first "raw" | |
151 | * call. */ | |
152 | if (netdev->state != _NETDEV_STATE_INVALID && | |
153 | NETDEV_VTABLE(netdev) && | |
aa9f1140 TG |
154 | NETDEV_VTABLE(netdev)->done) |
155 | NETDEV_VTABLE(netdev)->done(netdev); | |
156 | ||
52433f6b | 157 | free(netdev); |
02b59d57 TG |
158 | } |
159 | ||
14b746f7 TG |
160 | NetDev *netdev_unref(NetDev *netdev) { |
161 | if (netdev && (-- netdev->n_ref <= 0)) | |
162 | netdev_free(netdev); | |
163 | ||
164 | return NULL; | |
165 | } | |
166 | ||
167 | NetDev *netdev_ref(NetDev *netdev) { | |
168 | if (netdev) | |
169 | assert_se(++ netdev->n_ref >= 2); | |
170 | ||
171 | return netdev; | |
172 | } | |
173 | ||
2cc7e981 TG |
174 | void netdev_drop(NetDev *netdev) { |
175 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
176 | return; | |
177 | ||
178 | netdev->state = NETDEV_STATE_LINGER; | |
179 | ||
79008bdd | 180 | log_netdev_debug(netdev, "netdev removed"); |
370e9930 | 181 | |
2cc7e981 TG |
182 | netdev_cancel_callbacks(netdev); |
183 | ||
184 | netdev_unref(netdev); | |
185 | ||
186 | return; | |
187 | } | |
188 | ||
1a436809 TG |
189 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
190 | NetDev *netdev; | |
02b59d57 TG |
191 | |
192 | assert(manager); | |
193 | assert(name); | |
194 | assert(ret); | |
195 | ||
52433f6b TG |
196 | netdev = hashmap_get(manager->netdevs, name); |
197 | if (!netdev) { | |
02b59d57 TG |
198 | *ret = NULL; |
199 | return -ENOENT; | |
200 | } | |
201 | ||
52433f6b | 202 | *ret = netdev; |
02b59d57 TG |
203 | |
204 | return 0; | |
205 | } | |
206 | ||
1a436809 | 207 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 208 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 | 209 | |
62e2d5bb TG |
210 | netdev_cancel_callbacks(netdev); |
211 | ||
02b59d57 TG |
212 | return 0; |
213 | } | |
214 | ||
1c4baffc | 215 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) { |
4afd3348 | 216 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
02b59d57 TG |
217 | int r; |
218 | ||
52433f6b TG |
219 | assert(netdev); |
220 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
221 | assert(netdev->manager); |
222 | assert(netdev->manager->rtnl); | |
6cb955c6 | 223 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF)); |
02b59d57 TG |
224 | assert(link); |
225 | assert(callback); | |
226 | ||
4c387986 | 227 | if (link->flags & IFF_UP && netdev->kind == NETDEV_KIND_BOND) { |
14b6bb77 RW |
228 | log_netdev_debug(netdev, "Link '%s' was up when attempting to enslave it. Bringing link down.", link->ifname); |
229 | r = link_down(link); | |
230 | if (r < 0) | |
231 | return log_netdev_error_errno(netdev, r, "Could not bring link down: %m"); | |
232 | } | |
233 | ||
6a7a4e4d LP |
234 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
235 | if (r < 0) | |
236 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m"); | |
02b59d57 | 237 | |
1c4baffc | 238 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
6a7a4e4d LP |
239 | if (r < 0) |
240 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m"); | |
02b59d57 | 241 | |
1c4baffc | 242 | r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
6a7a4e4d | 243 | if (r < 0) |
b8b846d7 | 244 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); |
02b59d57 | 245 | |
563c69c6 TG |
246 | link_ref(link); |
247 | ||
6a7a4e4d | 248 | log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname); |
ab47d620 | 249 | |
02b59d57 TG |
250 | return 0; |
251 | } | |
252 | ||
1a436809 | 253 | static int netdev_enter_ready(NetDev *netdev) { |
3f265037 | 254 | netdev_join_callback *callback, *callback_next; |
ad0774e6 | 255 | int r; |
02b59d57 | 256 | |
52433f6b | 257 | assert(netdev); |
af4e9e2c | 258 | assert(netdev->ifname); |
924fe430 | 259 | |
ba5596ec TG |
260 | if (netdev->state != NETDEV_STATE_CREATING) |
261 | return 0; | |
262 | ||
52433f6b | 263 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 264 | |
98b32556 | 265 | log_netdev_info(netdev, "netdev ready"); |
02b59d57 | 266 | |
ad0774e6 | 267 | LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) { |
b226d99b | 268 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 269 | * link was ready */ |
ad0774e6 TG |
270 | r = netdev_enslave_ready(netdev, callback->link, callback->callback); |
271 | if (r < 0) | |
272 | return r; | |
273 | ||
274 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
275 | link_unref(callback->link); | |
276 | free(callback); | |
02b59d57 TG |
277 | } |
278 | ||
540eb5f0 SS |
279 | if (NETDEV_VTABLE(netdev)->post_create) |
280 | NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL); | |
281 | ||
02b59d57 TG |
282 | return 0; |
283 | } | |
8469c1d3 | 284 | |
d5b3d845 | 285 | /* callback for netdev's created without a backing Link */ |
1c4baffc | 286 | static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
8e766630 | 287 | _cleanup_(netdev_unrefp) NetDev *netdev = userdata; |
172f6635 | 288 | int r; |
02b59d57 | 289 | |
52433f6b | 290 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 | 291 | |
1c4baffc | 292 | r = sd_netlink_message_get_errno(m); |
e09826dc | 293 | if (r == -EEXIST) |
98b32556 | 294 | log_netdev_info(netdev, "netdev exists, using existing without changing its parameters"); |
505f8da7 | 295 | else if (r < 0) { |
6a7a4e4d | 296 | log_netdev_warning_errno(netdev, r, "netdev could not be created: %m"); |
37ebeb77 | 297 | netdev_drop(netdev); |
dd3efc09 TG |
298 | |
299 | return 1; | |
02b59d57 TG |
300 | } |
301 | ||
6a7a4e4d | 302 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 303 | |
dd3efc09 | 304 | return 1; |
02b59d57 TG |
305 | } |
306 | ||
1c4baffc | 307 | int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) { |
b226d99b TG |
308 | int r; |
309 | ||
3f265037 | 310 | assert(netdev); |
62e2d5bb TG |
311 | assert(netdev->manager); |
312 | assert(netdev->manager->rtnl); | |
6cb955c6 | 313 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF)); |
7951dea2 | 314 | |
52433f6b | 315 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
316 | r = netdev_enslave_ready(netdev, link, callback); |
317 | if (r < 0) | |
318 | return r; | |
62e2d5bb | 319 | } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) { |
4afd3348 | 320 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
62e2d5bb | 321 | |
05d0c2e3 | 322 | r = rtnl_message_new_synthetic_error(netdev->manager->rtnl, -ENODEV, 0, &m); |
62e2d5bb TG |
323 | if (r >= 0) |
324 | callback(netdev->manager->rtnl, m, link); | |
02b59d57 | 325 | } else { |
d076c6f9 | 326 | /* the netdev is not yet read, save this request for when it is */ |
3f265037 | 327 | netdev_join_callback *cb; |
02b59d57 | 328 | |
3f265037 | 329 | cb = new0(netdev_join_callback, 1); |
02b59d57 TG |
330 | if (!cb) |
331 | return log_oom(); | |
332 | ||
333 | cb->callback = callback; | |
334 | cb->link = link; | |
563c69c6 | 335 | link_ref(link); |
02b59d57 | 336 | |
52433f6b | 337 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
3be1d7e0 | 338 | |
6a7a4e4d | 339 | log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname); |
aa9f1140 | 340 | } |
3f265037 TG |
341 | |
342 | return 0; | |
343 | } | |
344 | ||
1c4baffc | 345 | int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) { |
c3ebdce3 | 346 | uint16_t type; |
d39edfc7 | 347 | const char *kind; |
ca4e095a LP |
348 | const char *received_kind; |
349 | const char *received_name; | |
d39edfc7 TG |
350 | int r, ifindex; |
351 | ||
50add290 | 352 | assert(netdev); |
c3ebdce3 | 353 | assert(message); |
02b59d57 | 354 | |
1c4baffc | 355 | r = sd_netlink_message_get_type(message, &type); |
6a7a4e4d LP |
356 | if (r < 0) |
357 | return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m"); | |
c3ebdce3 | 358 | |
ba5596ec | 359 | if (type != RTM_NEWLINK) { |
6a7a4e4d | 360 | log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type."); |
c3ebdce3 | 361 | return -EINVAL; |
ba5596ec | 362 | } |
d39edfc7 | 363 | |
a21df104 TG |
364 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
365 | if (r < 0) { | |
6a7a4e4d | 366 | log_netdev_error_errno(netdev, r, "Could not get ifindex: %m"); |
a21df104 TG |
367 | netdev_enter_failed(netdev); |
368 | return r; | |
369 | } else if (ifindex <= 0) { | |
79008bdd | 370 | log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex); |
a21df104 | 371 | netdev_enter_failed(netdev); |
6a7a4e4d | 372 | return -EINVAL; |
a21df104 TG |
373 | } |
374 | ||
a21df104 TG |
375 | if (netdev->ifindex > 0) { |
376 | if (netdev->ifindex != ifindex) { | |
79008bdd | 377 | log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d", |
a21df104 TG |
378 | ifindex, netdev->ifindex); |
379 | netdev_enter_failed(netdev); | |
380 | return -EEXIST; | |
381 | } else | |
382 | /* ifindex already set to the same for this netdev */ | |
383 | return 0; | |
384 | } | |
385 | ||
1c4baffc | 386 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name); |
6a7a4e4d LP |
387 | if (r < 0) |
388 | return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m"); | |
c6315a7a | 389 | |
af4e9e2c | 390 | if (!streq(netdev->ifname, received_name)) { |
6a7a4e4d | 391 | log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name); |
c6315a7a TG |
392 | netdev_enter_failed(netdev); |
393 | return r; | |
394 | } | |
395 | ||
1c4baffc | 396 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); |
6a7a4e4d LP |
397 | if (r < 0) |
398 | return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m"); | |
d39edfc7 | 399 | |
1c4baffc | 400 | r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind); |
6a7a4e4d LP |
401 | if (r < 0) |
402 | return log_netdev_error_errno(netdev, r, "Could not get KIND: %m"); | |
d39edfc7 | 403 | |
1c4baffc | 404 | r = sd_netlink_message_exit_container(message); |
6a7a4e4d LP |
405 | if (r < 0) |
406 | return log_netdev_error_errno(netdev, r, "Could not exit container: %m"); | |
505f8da7 | 407 | |
30ae9dfd SS |
408 | if (netdev->kind == NETDEV_KIND_TAP) |
409 | /* the kernel does not distinguish between tun and tap */ | |
410 | kind = "tun"; | |
411 | else { | |
412 | kind = netdev_kind_to_string(netdev->kind); | |
413 | if (!kind) { | |
79008bdd | 414 | log_netdev_error(netdev, "Could not get kind"); |
30ae9dfd SS |
415 | netdev_enter_failed(netdev); |
416 | return -EINVAL; | |
417 | } | |
c3ebdce3 TG |
418 | } |
419 | ||
d39edfc7 | 420 | if (!streq(kind, received_kind)) { |
79008bdd | 421 | log_netdev_error(netdev, |
30ae9dfd | 422 | "Received newlink with wrong KIND %s, " |
c6315a7a | 423 | "expected %s", received_kind, kind); |
d39edfc7 TG |
424 | netdev_enter_failed(netdev); |
425 | return r; | |
426 | } | |
427 | ||
50add290 | 428 | netdev->ifindex = ifindex; |
52433f6b | 429 | |
79008bdd | 430 | log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex); |
5261692f | 431 | |
52433f6b | 432 | netdev_enter_ready(netdev); |
02b59d57 TG |
433 | |
434 | return 0; | |
435 | } | |
436 | ||
5c8f858d TG |
437 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
438 | ||
3be1d7e0 | 439 | int netdev_get_mac(const char *ifname, struct ether_addr **ret) { |
5c8f858d | 440 | _cleanup_free_ struct ether_addr *mac = NULL; |
dbe81cbd | 441 | uint64_t result; |
5c8f858d TG |
442 | size_t l, sz; |
443 | uint8_t *v; | |
444 | int r; | |
445 | ||
446 | assert(ifname); | |
447 | assert(ret); | |
448 | ||
449 | mac = new0(struct ether_addr, 1); | |
450 | if (!mac) | |
451 | return -ENOMEM; | |
452 | ||
453 | l = strlen(ifname); | |
454 | sz = sizeof(sd_id128_t) + l; | |
455 | v = alloca(sz); | |
456 | ||
457 | /* fetch some persistent data unique to the machine */ | |
458 | r = sd_id128_get_machine((sd_id128_t*) v); | |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
462 | /* combine with some data unique (on this machine) to this | |
463 | * netdev */ | |
464 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
465 | ||
466 | /* Let's hash the host machine ID plus the container name. We | |
467 | * use a fixed, but originally randomly created hash key here. */ | |
933f9cae | 468 | result = siphash24(v, sz, HASH_KEY.bytes); |
5c8f858d TG |
469 | |
470 | assert_cc(ETH_ALEN <= sizeof(result)); | |
dbe81cbd | 471 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
5c8f858d TG |
472 | |
473 | /* see eth_random_addr in the kernel */ | |
474 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
475 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
476 | ||
ae2a15bc | 477 | *ret = TAKE_PTR(mac); |
5c8f858d TG |
478 | |
479 | return 0; | |
480 | } | |
481 | ||
6c3e68e7 | 482 | static int netdev_create(NetDev *netdev, Link *link, |
1c4baffc | 483 | sd_netlink_message_handler_t callback) { |
aa9f1140 TG |
484 | int r; |
485 | ||
486 | assert(netdev); | |
6c3e68e7 | 487 | assert(!link || callback); |
aa9f1140 TG |
488 | |
489 | /* create netdev */ | |
490 | if (NETDEV_VTABLE(netdev)->create) { | |
6c3e68e7 TG |
491 | assert(!link); |
492 | ||
aa9f1140 TG |
493 | r = NETDEV_VTABLE(netdev)->create(netdev); |
494 | if (r < 0) | |
495 | return r; | |
496 | ||
6a7a4e4d | 497 | log_netdev_debug(netdev, "Created"); |
aa9f1140 | 498 | } else { |
4afd3348 | 499 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
aa9f1140 TG |
500 | |
501 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
6a7a4e4d LP |
502 | if (r < 0) |
503 | return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m"); | |
aa9f1140 | 504 | |
1c4baffc | 505 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); |
6a7a4e4d LP |
506 | if (r < 0) |
507 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m"); | |
aa9f1140 TG |
508 | |
509 | if (netdev->mac) { | |
1c4baffc | 510 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); |
6a7a4e4d LP |
511 | if (r < 0) |
512 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m"); | |
aa9f1140 TG |
513 | } |
514 | ||
515 | if (netdev->mtu) { | |
1c4baffc | 516 | r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); |
6a7a4e4d LP |
517 | if (r < 0) |
518 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m"); | |
aa9f1140 TG |
519 | } |
520 | ||
521 | if (link) { | |
1c4baffc | 522 | r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex); |
6a7a4e4d LP |
523 | if (r < 0) |
524 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m"); | |
aa9f1140 TG |
525 | } |
526 | ||
1c4baffc | 527 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); |
6a7a4e4d LP |
528 | if (r < 0) |
529 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 530 | |
1c4baffc | 531 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); |
6a7a4e4d LP |
532 | if (r < 0) |
533 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); | |
aa9f1140 TG |
534 | |
535 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
536 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
537 | if (r < 0) | |
538 | return r; | |
539 | } | |
540 | ||
1c4baffc | 541 | r = sd_netlink_message_close_container(m); |
6a7a4e4d | 542 | if (r < 0) |
9b53e129 | 543 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m"); |
aa9f1140 | 544 | |
1c4baffc | 545 | r = sd_netlink_message_close_container(m); |
6a7a4e4d LP |
546 | if (r < 0) |
547 | return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m"); | |
aa9f1140 | 548 | |
6c3e68e7 | 549 | if (link) { |
1c4baffc | 550 | r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL); |
6a7a4e4d LP |
551 | if (r < 0) |
552 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
aa9f1140 | 553 | |
6c3e68e7 TG |
554 | link_ref(link); |
555 | } else { | |
1c4baffc | 556 | r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL); |
6a7a4e4d LP |
557 | if (r < 0) |
558 | return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m"); | |
6c3e68e7 TG |
559 | |
560 | netdev_ref(netdev); | |
561 | } | |
aa9f1140 TG |
562 | |
563 | netdev->state = NETDEV_STATE_CREATING; | |
564 | ||
6a7a4e4d | 565 | log_netdev_debug(netdev, "Creating"); |
aa9f1140 TG |
566 | } |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ | |
1c4baffc | 572 | int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) { |
aa9f1140 TG |
573 | int r; |
574 | ||
575 | assert(netdev); | |
576 | assert(netdev->manager); | |
577 | assert(netdev->manager->rtnl); | |
578 | assert(NETDEV_VTABLE(netdev)); | |
579 | ||
580 | switch (NETDEV_VTABLE(netdev)->create_type) { | |
581 | case NETDEV_CREATE_MASTER: | |
582 | r = netdev_enslave(netdev, link, callback); | |
583 | if (r < 0) | |
584 | return r; | |
585 | ||
586 | break; | |
587 | case NETDEV_CREATE_STACKED: | |
6c3e68e7 | 588 | r = netdev_create(netdev, link, callback); |
aa9f1140 TG |
589 | if (r < 0) |
590 | return r; | |
591 | ||
592 | break; | |
593 | default: | |
594 | assert_not_reached("Can not join independent netdev"); | |
595 | } | |
596 | ||
597 | return 0; | |
598 | } | |
599 | ||
52433f6b | 600 | static int netdev_load_one(Manager *manager, const char *filename) { |
8e766630 | 601 | _cleanup_(netdev_unrefp) NetDev *netdev_raw = NULL, *netdev = NULL; |
02b59d57 | 602 | _cleanup_fclose_ FILE *file = NULL; |
2cc34d5b | 603 | const char *dropin_dirname; |
4d7fa6de | 604 | bool independent = false; |
02b59d57 TG |
605 | int r; |
606 | ||
bf1bc670 TA |
607 | assert(manager); |
608 | assert(filename); | |
609 | ||
02b59d57 TG |
610 | file = fopen(filename, "re"); |
611 | if (!file) { | |
612 | if (errno == ENOENT) | |
613 | return 0; | |
f3c33b23 LP |
614 | |
615 | return -errno; | |
02b59d57 TG |
616 | } |
617 | ||
ed88bcfb ZJS |
618 | if (null_or_empty_fd(fileno(file))) { |
619 | log_debug("Skipping empty file: %s", filename); | |
620 | return 0; | |
621 | } | |
622 | ||
aa9f1140 TG |
623 | netdev_raw = new0(NetDev, 1); |
624 | if (!netdev_raw) | |
02b59d57 TG |
625 | return log_oom(); |
626 | ||
281bb5c1 | 627 | netdev_raw->n_ref = 1; |
aa9f1140 | 628 | netdev_raw->kind = _NETDEV_KIND_INVALID; |
f3c33b23 | 629 | netdev_raw->state = _NETDEV_STATE_INVALID; /* an invalid state means done() of the implementation won't be called on destruction */ |
02b59d57 | 630 | |
281bb5c1 | 631 | dropin_dirname = strjoina(basename(filename), ".d"); |
2cc34d5b ZJS |
632 | r = config_parse_many(filename, network_dirs, dropin_dirname, |
633 | "Match\0NetDev\0", | |
634 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
5360d771 | 635 | CONFIG_PARSE_WARN|CONFIG_PARSE_RELAXED, netdev_raw); |
36f822c4 | 636 | if (r < 0) |
02b59d57 | 637 | return r; |
02b59d57 | 638 | |
2023dc8a TG |
639 | /* skip out early if configuration does not match the environment */ |
640 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, | |
aa9f1140 | 641 | netdev_raw->match_host, netdev_raw->match_virt, |
5022f08a LP |
642 | netdev_raw->match_kernel_cmdline, netdev_raw->match_kernel_version, |
643 | netdev_raw->match_arch, | |
32bc8adc | 644 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
2023dc8a TG |
645 | return 0; |
646 | ||
2f27e2c5 | 647 | if (netdev_raw->kind == _NETDEV_KIND_INVALID) { |
881e6b5e | 648 | log_warning("NetDev has no Kind configured in %s. Ignoring", filename); |
52433f6b | 649 | return 0; |
3be1d7e0 | 650 | } |
2023dc8a | 651 | |
aa9f1140 | 652 | if (!netdev_raw->ifname) { |
1a436809 | 653 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
326cb406 SS |
654 | return 0; |
655 | } | |
656 | ||
281bb5c1 ZJS |
657 | r = fseek(file, 0, SEEK_SET); |
658 | if (r < 0) | |
659 | return -errno; | |
660 | ||
aa9f1140 TG |
661 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); |
662 | if (!netdev) | |
663 | return log_oom(); | |
fe6b2d55 | 664 | |
aa9f1140 TG |
665 | netdev->n_ref = 1; |
666 | netdev->manager = manager; | |
aa9f1140 | 667 | netdev->kind = netdev_raw->kind; |
f3c33b23 | 668 | netdev->state = NETDEV_STATE_LOADING; /* we initialize the state here for the first time, so that done() will be called on destruction */ |
326cb406 | 669 | |
aa9f1140 TG |
670 | if (NETDEV_VTABLE(netdev)->init) |
671 | NETDEV_VTABLE(netdev)->init(netdev); | |
672 | ||
673 | r = config_parse(NULL, filename, file, | |
674 | NETDEV_VTABLE(netdev)->sections, | |
675 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
bcde742e | 676 | CONFIG_PARSE_WARN, netdev); |
aa9f1140 TG |
677 | if (r < 0) |
678 | return r; | |
679 | ||
680 | /* verify configuration */ | |
681 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
682 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
683 | if (r < 0) | |
684 | return 0; | |
fe6b2d55 TG |
685 | } |
686 | ||
52433f6b TG |
687 | netdev->filename = strdup(filename); |
688 | if (!netdev->filename) | |
02b59d57 TG |
689 | return log_oom(); |
690 | ||
bc48c51f | 691 | if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) { |
5c8f858d | 692 | r = netdev_get_mac(netdev->ifname, &netdev->mac); |
6a7a4e4d LP |
693 | if (r < 0) |
694 | return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname); | |
5c8f858d TG |
695 | } |
696 | ||
af4e9e2c | 697 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
02b59d57 TG |
698 | if (r < 0) |
699 | return r; | |
700 | ||
52433f6b | 701 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 702 | |
79008bdd | 703 | log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
3be1d7e0 | 704 | |
aa9f1140 TG |
705 | switch (NETDEV_VTABLE(netdev)->create_type) { |
706 | case NETDEV_CREATE_MASTER: | |
707 | case NETDEV_CREATE_INDEPENDENT: | |
6c3e68e7 | 708 | r = netdev_create(netdev, NULL, NULL); |
9e358851 | 709 | if (r < 0) |
4d7fa6de SS |
710 | return r; |
711 | ||
712 | break; | |
713 | default: | |
714 | break; | |
715 | } | |
9e358851 | 716 | |
4d7fa6de SS |
717 | switch (netdev->kind) { |
718 | case NETDEV_KIND_IPIP: | |
719 | independent = IPIP(netdev)->independent; | |
720 | break; | |
721 | case NETDEV_KIND_GRE: | |
722 | independent = GRE(netdev)->independent; | |
723 | break; | |
724 | case NETDEV_KIND_GRETAP: | |
725 | independent = GRETAP(netdev)->independent; | |
726 | break; | |
727 | case NETDEV_KIND_IP6GRE: | |
728 | independent = IP6GRE(netdev)->independent; | |
729 | break; | |
730 | case NETDEV_KIND_IP6GRETAP: | |
731 | independent = IP6GRETAP(netdev)->independent; | |
732 | break; | |
733 | case NETDEV_KIND_SIT: | |
734 | independent = SIT(netdev)->independent; | |
735 | break; | |
736 | case NETDEV_KIND_VTI: | |
737 | independent = VTI(netdev)->independent; | |
738 | break; | |
739 | case NETDEV_KIND_VTI6: | |
740 | independent = VTI6(netdev)->independent; | |
741 | break; | |
742 | case NETDEV_KIND_IP6TNL: | |
743 | independent = IP6TNL(netdev)->independent; | |
aa9f1140 TG |
744 | break; |
745 | default: | |
746 | break; | |
54abf461 | 747 | } |
02b59d57 | 748 | |
4d7fa6de SS |
749 | if (independent) { |
750 | r = netdev_create(netdev, NULL, NULL); | |
751 | if (r < 0) | |
752 | return r; | |
753 | } | |
754 | ||
52433f6b | 755 | netdev = NULL; |
02b59d57 TG |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
52433f6b | 760 | int netdev_load(Manager *manager) { |
6a7a4e4d | 761 | _cleanup_strv_free_ char **files = NULL; |
1a436809 | 762 | NetDev *netdev; |
6a7a4e4d | 763 | char **f; |
02b59d57 TG |
764 | int r; |
765 | ||
766 | assert(manager); | |
767 | ||
52433f6b | 768 | while ((netdev = hashmap_first(manager->netdevs))) |
14b746f7 | 769 | netdev_unref(netdev); |
02b59d57 | 770 | |
b5084605 | 771 | r = conf_files_list_strv(&files, ".netdev", NULL, 0, network_dirs); |
f647962d MS |
772 | if (r < 0) |
773 | return log_error_errno(r, "Failed to enumerate netdev files: %m"); | |
02b59d57 TG |
774 | |
775 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 776 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
777 | if (r < 0) |
778 | return r; | |
779 | } | |
780 | ||
02b59d57 TG |
781 | return 0; |
782 | } |