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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | /* Make sure the net/if.h header is included before any linux/ one */ | |
4 | #include <net/if.h> | |
5 | #include <netinet/in.h> | |
6 | #include <linux/if_arp.h> | |
7 | #include <unistd.h> | |
8 | ||
9 | #include "alloc-util.h" | |
10 | #include "arphrd-util.h" | |
11 | #include "bareudp.h" | |
12 | #include "batadv.h" | |
13 | #include "bond.h" | |
14 | #include "bridge.h" | |
15 | #include "conf-files.h" | |
16 | #include "conf-parser.h" | |
17 | #include "dummy.h" | |
18 | #include "fd-util.h" | |
19 | #include "fou-tunnel.h" | |
20 | #include "geneve.h" | |
21 | #include "ifb.h" | |
22 | #include "ipoib.h" | |
23 | #include "ipvlan.h" | |
24 | #include "l2tp-tunnel.h" | |
25 | #include "list.h" | |
26 | #include "macsec.h" | |
27 | #include "macvlan.h" | |
28 | #include "netdev.h" | |
29 | #include "netdevsim.h" | |
30 | #include "netif-util.h" | |
31 | #include "netlink-util.h" | |
32 | #include "networkd-manager.h" | |
33 | #include "networkd-queue.h" | |
34 | #include "networkd-setlink.h" | |
35 | #include "networkd-sriov.h" | |
36 | #include "nlmon.h" | |
37 | #include "path-lookup.h" | |
38 | #include "siphash24.h" | |
39 | #include "stat-util.h" | |
40 | #include "string-table.h" | |
41 | #include "string-util.h" | |
42 | #include "strv.h" | |
43 | #include "tunnel.h" | |
44 | #include "tuntap.h" | |
45 | #include "vcan.h" | |
46 | #include "veth.h" | |
47 | #include "vlan.h" | |
48 | #include "vrf.h" | |
49 | #include "vxcan.h" | |
50 | #include "vxlan.h" | |
51 | #include "wireguard.h" | |
52 | #include "wlan.h" | |
53 | #include "xfrm.h" | |
54 | ||
55 | const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { | |
56 | [NETDEV_KIND_BAREUDP] = &bare_udp_vtable, | |
57 | [NETDEV_KIND_BATADV] = &batadv_vtable, | |
58 | [NETDEV_KIND_BOND] = &bond_vtable, | |
59 | [NETDEV_KIND_BRIDGE] = &bridge_vtable, | |
60 | [NETDEV_KIND_DUMMY] = &dummy_vtable, | |
61 | [NETDEV_KIND_ERSPAN] = &erspan_vtable, | |
62 | [NETDEV_KIND_FOU] = &foutnl_vtable, | |
63 | [NETDEV_KIND_GENEVE] = &geneve_vtable, | |
64 | [NETDEV_KIND_GRE] = &gre_vtable, | |
65 | [NETDEV_KIND_GRETAP] = &gretap_vtable, | |
66 | [NETDEV_KIND_IFB] = &ifb_vtable, | |
67 | [NETDEV_KIND_IP6GRE] = &ip6gre_vtable, | |
68 | [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable, | |
69 | [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable, | |
70 | [NETDEV_KIND_IPIP] = &ipip_vtable, | |
71 | [NETDEV_KIND_IPOIB] = &ipoib_vtable, | |
72 | [NETDEV_KIND_IPVLAN] = &ipvlan_vtable, | |
73 | [NETDEV_KIND_IPVTAP] = &ipvtap_vtable, | |
74 | [NETDEV_KIND_L2TP] = &l2tptnl_vtable, | |
75 | [NETDEV_KIND_MACSEC] = &macsec_vtable, | |
76 | [NETDEV_KIND_MACVLAN] = &macvlan_vtable, | |
77 | [NETDEV_KIND_MACVTAP] = &macvtap_vtable, | |
78 | [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable, | |
79 | [NETDEV_KIND_NLMON] = &nlmon_vtable, | |
80 | [NETDEV_KIND_SIT] = &sit_vtable, | |
81 | [NETDEV_KIND_TAP] = &tap_vtable, | |
82 | [NETDEV_KIND_TUN] = &tun_vtable, | |
83 | [NETDEV_KIND_VCAN] = &vcan_vtable, | |
84 | [NETDEV_KIND_VETH] = &veth_vtable, | |
85 | [NETDEV_KIND_VLAN] = &vlan_vtable, | |
86 | [NETDEV_KIND_VRF] = &vrf_vtable, | |
87 | [NETDEV_KIND_VTI6] = &vti6_vtable, | |
88 | [NETDEV_KIND_VTI] = &vti_vtable, | |
89 | [NETDEV_KIND_VXCAN] = &vxcan_vtable, | |
90 | [NETDEV_KIND_VXLAN] = &vxlan_vtable, | |
91 | [NETDEV_KIND_WIREGUARD] = &wireguard_vtable, | |
92 | [NETDEV_KIND_WLAN] = &wlan_vtable, | |
93 | [NETDEV_KIND_XFRM] = &xfrm_vtable, | |
94 | }; | |
95 | ||
96 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { | |
97 | [NETDEV_KIND_BAREUDP] = "bareudp", | |
98 | [NETDEV_KIND_BATADV] = "batadv", | |
99 | [NETDEV_KIND_BOND] = "bond", | |
100 | [NETDEV_KIND_BRIDGE] = "bridge", | |
101 | [NETDEV_KIND_DUMMY] = "dummy", | |
102 | [NETDEV_KIND_ERSPAN] = "erspan", | |
103 | [NETDEV_KIND_FOU] = "fou", | |
104 | [NETDEV_KIND_GENEVE] = "geneve", | |
105 | [NETDEV_KIND_GRE] = "gre", | |
106 | [NETDEV_KIND_GRETAP] = "gretap", | |
107 | [NETDEV_KIND_IFB] = "ifb", | |
108 | [NETDEV_KIND_IP6GRE] = "ip6gre", | |
109 | [NETDEV_KIND_IP6GRETAP] = "ip6gretap", | |
110 | [NETDEV_KIND_IP6TNL] = "ip6tnl", | |
111 | [NETDEV_KIND_IPIP] = "ipip", | |
112 | [NETDEV_KIND_IPOIB] = "ipoib", | |
113 | [NETDEV_KIND_IPVLAN] = "ipvlan", | |
114 | [NETDEV_KIND_IPVTAP] = "ipvtap", | |
115 | [NETDEV_KIND_L2TP] = "l2tp", | |
116 | [NETDEV_KIND_MACSEC] = "macsec", | |
117 | [NETDEV_KIND_MACVLAN] = "macvlan", | |
118 | [NETDEV_KIND_MACVTAP] = "macvtap", | |
119 | [NETDEV_KIND_NETDEVSIM] = "netdevsim", | |
120 | [NETDEV_KIND_NLMON] = "nlmon", | |
121 | [NETDEV_KIND_SIT] = "sit", | |
122 | [NETDEV_KIND_TAP] = "tap", | |
123 | [NETDEV_KIND_TUN] = "tun", | |
124 | [NETDEV_KIND_VCAN] = "vcan", | |
125 | [NETDEV_KIND_VETH] = "veth", | |
126 | [NETDEV_KIND_VLAN] = "vlan", | |
127 | [NETDEV_KIND_VRF] = "vrf", | |
128 | [NETDEV_KIND_VTI6] = "vti6", | |
129 | [NETDEV_KIND_VTI] = "vti", | |
130 | [NETDEV_KIND_VXCAN] = "vxcan", | |
131 | [NETDEV_KIND_VXLAN] = "vxlan", | |
132 | [NETDEV_KIND_WIREGUARD] = "wireguard", | |
133 | [NETDEV_KIND_WLAN] = "wlan", | |
134 | [NETDEV_KIND_XFRM] = "xfrm", | |
135 | }; | |
136 | ||
137 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); | |
138 | ||
139 | bool netdev_is_managed(NetDev *netdev) { | |
140 | if (!netdev || !netdev->manager || !netdev->ifname) | |
141 | return false; | |
142 | ||
143 | return hashmap_get(netdev->manager->netdevs, netdev->ifname) == netdev; | |
144 | } | |
145 | ||
146 | static bool netdev_is_stacked_and_independent(NetDev *netdev) { | |
147 | assert(netdev); | |
148 | ||
149 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) | |
150 | return false; | |
151 | ||
152 | switch (netdev->kind) { | |
153 | case NETDEV_KIND_ERSPAN: | |
154 | return ERSPAN(netdev)->independent; | |
155 | case NETDEV_KIND_GRE: | |
156 | return GRE(netdev)->independent; | |
157 | case NETDEV_KIND_GRETAP: | |
158 | return GRETAP(netdev)->independent; | |
159 | case NETDEV_KIND_IP6GRE: | |
160 | return IP6GRE(netdev)->independent; | |
161 | case NETDEV_KIND_IP6GRETAP: | |
162 | return IP6GRETAP(netdev)->independent; | |
163 | case NETDEV_KIND_IP6TNL: | |
164 | return IP6TNL(netdev)->independent; | |
165 | case NETDEV_KIND_IPIP: | |
166 | return IPIP(netdev)->independent; | |
167 | case NETDEV_KIND_SIT: | |
168 | return SIT(netdev)->independent; | |
169 | case NETDEV_KIND_VTI: | |
170 | return VTI(netdev)->independent; | |
171 | case NETDEV_KIND_VTI6: | |
172 | return VTI6(netdev)->independent; | |
173 | case NETDEV_KIND_VXLAN: | |
174 | return VXLAN(netdev)->independent; | |
175 | case NETDEV_KIND_XFRM: | |
176 | return XFRM(netdev)->independent; | |
177 | default: | |
178 | return false; | |
179 | } | |
180 | } | |
181 | ||
182 | static bool netdev_is_stacked(NetDev *netdev) { | |
183 | assert(netdev); | |
184 | ||
185 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) | |
186 | return false; | |
187 | ||
188 | if (netdev_is_stacked_and_independent(netdev)) | |
189 | return false; | |
190 | ||
191 | return true; | |
192 | } | |
193 | ||
194 | static void netdev_detach_from_manager(NetDev *netdev) { | |
195 | if (netdev->ifname && netdev->manager) | |
196 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
197 | } | |
198 | ||
199 | static NetDev *netdev_free(NetDev *netdev) { | |
200 | assert(netdev); | |
201 | ||
202 | /* Invoke the per-kind done() destructor, but only if the state field is initialized. We conditionalize that | |
203 | * because we parse .netdev files twice: once to determine the kind (with a short, minimal NetDev structure | |
204 | * allocation, with no room for per-kind fields), and once to read the kind's properties (with a full, | |
205 | * comprehensive NetDev structure allocation with enough space for whatever the specific kind needs). Now, in | |
206 | * the first case we shouldn't try to destruct the per-kind NetDev fields on destruction, in the second case we | |
207 | * should. We use the state field to discern the two cases: it's _NETDEV_STATE_INVALID on the first "raw" | |
208 | * call. */ | |
209 | if (netdev->state != _NETDEV_STATE_INVALID && | |
210 | NETDEV_VTABLE(netdev) && | |
211 | NETDEV_VTABLE(netdev)->done) | |
212 | NETDEV_VTABLE(netdev)->done(netdev); | |
213 | ||
214 | netdev_detach_from_manager(netdev); | |
215 | ||
216 | condition_free_list(netdev->conditions); | |
217 | free(netdev->filename); | |
218 | free(netdev->description); | |
219 | free(netdev->ifname); | |
220 | ||
221 | return mfree(netdev); | |
222 | } | |
223 | ||
224 | DEFINE_TRIVIAL_REF_UNREF_FUNC(NetDev, netdev, netdev_free); | |
225 | ||
226 | void netdev_drop(NetDev *netdev) { | |
227 | if (!netdev) | |
228 | return; | |
229 | ||
230 | if (netdev_is_stacked(netdev)) { | |
231 | /* The netdev may be removed due to the underlying device removal, and the device may | |
232 | * be re-added later. */ | |
233 | netdev->state = NETDEV_STATE_LOADING; | |
234 | netdev->ifindex = 0; | |
235 | ||
236 | log_netdev_debug(netdev, "netdev removed"); | |
237 | return; | |
238 | } | |
239 | ||
240 | if (NETDEV_VTABLE(netdev) && NETDEV_VTABLE(netdev)->drop) | |
241 | NETDEV_VTABLE(netdev)->drop(netdev); | |
242 | ||
243 | netdev->state = NETDEV_STATE_LINGER; | |
244 | ||
245 | log_netdev_debug(netdev, "netdev removed"); | |
246 | ||
247 | netdev_detach_from_manager(netdev); | |
248 | netdev_unref(netdev); | |
249 | return; | |
250 | } | |
251 | ||
252 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { | |
253 | NetDev *netdev; | |
254 | ||
255 | assert(manager); | |
256 | assert(name); | |
257 | assert(ret); | |
258 | ||
259 | netdev = hashmap_get(manager->netdevs, name); | |
260 | if (!netdev) | |
261 | return -ENOENT; | |
262 | ||
263 | *ret = netdev; | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | void netdev_enter_failed(NetDev *netdev) { | |
269 | netdev->state = NETDEV_STATE_FAILED; | |
270 | } | |
271 | ||
272 | static int netdev_enter_ready(NetDev *netdev) { | |
273 | assert(netdev); | |
274 | assert(netdev->ifname); | |
275 | ||
276 | if (netdev->state != NETDEV_STATE_CREATING) | |
277 | return 0; | |
278 | ||
279 | netdev->state = NETDEV_STATE_READY; | |
280 | ||
281 | log_netdev_info(netdev, "netdev ready"); | |
282 | ||
283 | if (NETDEV_VTABLE(netdev)->post_create) | |
284 | NETDEV_VTABLE(netdev)->post_create(netdev, NULL); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* callback for netdev's created without a backing Link */ | |
290 | static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { | |
291 | int r; | |
292 | ||
293 | assert(netdev); | |
294 | assert(netdev->state != _NETDEV_STATE_INVALID); | |
295 | ||
296 | r = sd_netlink_message_get_errno(m); | |
297 | if (r == -EEXIST) | |
298 | log_netdev_info(netdev, "netdev exists, using existing without changing its parameters"); | |
299 | else if (r < 0) { | |
300 | log_netdev_warning_errno(netdev, r, "netdev could not be created: %m"); | |
301 | netdev_enter_failed(netdev); | |
302 | ||
303 | return 1; | |
304 | } | |
305 | ||
306 | log_netdev_debug(netdev, "Created"); | |
307 | ||
308 | return 1; | |
309 | } | |
310 | ||
311 | int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) { | |
312 | uint16_t type; | |
313 | const char *kind; | |
314 | const char *received_kind; | |
315 | const char *received_name; | |
316 | int r, ifindex; | |
317 | ||
318 | assert(netdev); | |
319 | assert(message); | |
320 | ||
321 | r = sd_netlink_message_get_type(message, &type); | |
322 | if (r < 0) | |
323 | return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m"); | |
324 | ||
325 | if (type != RTM_NEWLINK) | |
326 | return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL), "Cannot set ifindex from unexpected rtnl message type."); | |
327 | ||
328 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
329 | if (r < 0) { | |
330 | log_netdev_error_errno(netdev, r, "Could not get ifindex: %m"); | |
331 | netdev_enter_failed(netdev); | |
332 | return r; | |
333 | } else if (ifindex <= 0) { | |
334 | log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex); | |
335 | netdev_enter_failed(netdev); | |
336 | return -EINVAL; | |
337 | } | |
338 | ||
339 | if (netdev->ifindex > 0) { | |
340 | if (netdev->ifindex != ifindex) { | |
341 | log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d", | |
342 | ifindex, netdev->ifindex); | |
343 | netdev_enter_failed(netdev); | |
344 | return -EEXIST; | |
345 | } else | |
346 | /* ifindex already set to the same for this netdev */ | |
347 | return 0; | |
348 | } | |
349 | ||
350 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name); | |
351 | if (r < 0) | |
352 | return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m"); | |
353 | ||
354 | if (!streq(netdev->ifname, received_name)) { | |
355 | log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name); | |
356 | netdev_enter_failed(netdev); | |
357 | return -EINVAL; | |
358 | } | |
359 | ||
360 | if (!NETDEV_VTABLE(netdev)->skip_netdev_kind_check) { | |
361 | ||
362 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
363 | if (r < 0) | |
364 | return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m"); | |
365 | ||
366 | r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind); | |
367 | if (r < 0) | |
368 | return log_netdev_error_errno(netdev, r, "Could not get KIND: %m"); | |
369 | ||
370 | r = sd_netlink_message_exit_container(message); | |
371 | if (r < 0) | |
372 | return log_netdev_error_errno(netdev, r, "Could not exit container: %m"); | |
373 | ||
374 | if (netdev->kind == NETDEV_KIND_TAP) | |
375 | /* the kernel does not distinguish between tun and tap */ | |
376 | kind = "tun"; | |
377 | else { | |
378 | kind = netdev_kind_to_string(netdev->kind); | |
379 | if (!kind) { | |
380 | log_netdev_error(netdev, "Could not get kind"); | |
381 | netdev_enter_failed(netdev); | |
382 | return -EINVAL; | |
383 | } | |
384 | } | |
385 | ||
386 | if (!streq(kind, received_kind)) { | |
387 | log_netdev_error(netdev, "Received newlink with wrong KIND %s, expected %s", | |
388 | received_kind, kind); | |
389 | netdev_enter_failed(netdev); | |
390 | return -EINVAL; | |
391 | } | |
392 | } | |
393 | ||
394 | netdev->ifindex = ifindex; | |
395 | ||
396 | log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex); | |
397 | ||
398 | netdev_enter_ready(netdev); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) | |
404 | ||
405 | int netdev_generate_hw_addr( | |
406 | NetDev *netdev, | |
407 | Link *parent, | |
408 | const char *name, | |
409 | const struct hw_addr_data *hw_addr, | |
410 | struct hw_addr_data *ret) { | |
411 | ||
412 | struct hw_addr_data a = HW_ADDR_NULL; | |
413 | bool is_static = false; | |
414 | int r; | |
415 | ||
416 | assert(netdev); | |
417 | assert(name); | |
418 | assert(hw_addr); | |
419 | assert(ret); | |
420 | ||
421 | if (hw_addr_equal(hw_addr, &HW_ADDR_NONE)) { | |
422 | *ret = HW_ADDR_NULL; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | if (hw_addr->length == 0) { | |
427 | uint64_t result; | |
428 | ||
429 | /* HardwareAddress= is not specified. */ | |
430 | ||
431 | if (!NETDEV_VTABLE(netdev)->generate_mac) | |
432 | goto finalize; | |
433 | ||
434 | if (!IN_SET(NETDEV_VTABLE(netdev)->iftype, ARPHRD_ETHER, ARPHRD_INFINIBAND)) | |
435 | goto finalize; | |
436 | ||
437 | r = net_get_unique_predictable_data_from_name(name, &HASH_KEY, &result); | |
438 | if (r < 0) { | |
439 | log_netdev_warning_errno(netdev, r, | |
440 | "Failed to generate persistent MAC address, ignoring: %m"); | |
441 | goto finalize; | |
442 | } | |
443 | ||
444 | a.length = arphrd_to_hw_addr_len(NETDEV_VTABLE(netdev)->iftype); | |
445 | ||
446 | switch (NETDEV_VTABLE(netdev)->iftype) { | |
447 | case ARPHRD_ETHER: | |
448 | assert(a.length <= sizeof(result)); | |
449 | memcpy(a.bytes, &result, a.length); | |
450 | ||
451 | if (ether_addr_is_null(&a.ether) || ether_addr_is_broadcast(&a.ether)) { | |
452 | log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), | |
453 | "Failed to generate persistent MAC address, ignoring: %m"); | |
454 | a = HW_ADDR_NULL; | |
455 | goto finalize; | |
456 | } | |
457 | ||
458 | break; | |
459 | case ARPHRD_INFINIBAND: | |
460 | if (result == 0) { | |
461 | log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), | |
462 | "Failed to generate persistent MAC address: %m"); | |
463 | goto finalize; | |
464 | } | |
465 | ||
466 | assert(a.length >= sizeof(result)); | |
467 | memzero(a.bytes, a.length - sizeof(result)); | |
468 | memcpy(a.bytes + a.length - sizeof(result), &result, sizeof(result)); | |
469 | break; | |
470 | default: | |
471 | assert_not_reached(); | |
472 | } | |
473 | ||
474 | } else { | |
475 | a = *hw_addr; | |
476 | is_static = true; | |
477 | } | |
478 | ||
479 | r = net_verify_hardware_address(name, is_static, NETDEV_VTABLE(netdev)->iftype, | |
480 | parent ? &parent->hw_addr : NULL, &a); | |
481 | if (r < 0) | |
482 | return r; | |
483 | ||
484 | finalize: | |
485 | *ret = a; | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static int netdev_create_message(NetDev *netdev, Link *link, sd_netlink_message *m) { | |
490 | int r; | |
491 | ||
492 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); | |
493 | if (r < 0) | |
494 | return r; | |
495 | ||
496 | struct hw_addr_data hw_addr; | |
497 | r = netdev_generate_hw_addr(netdev, link, netdev->ifname, &netdev->hw_addr, &hw_addr); | |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
501 | if (hw_addr.length > 0) { | |
502 | log_netdev_debug(netdev, "Using MAC address: %s", HW_ADDR_TO_STR(&hw_addr)); | |
503 | r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &hw_addr); | |
504 | if (r < 0) | |
505 | return r; | |
506 | } | |
507 | ||
508 | if (netdev->mtu != 0) { | |
509 | r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); | |
510 | if (r < 0) | |
511 | return r; | |
512 | } | |
513 | ||
514 | if (link) { | |
515 | r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex); | |
516 | if (r < 0) | |
517 | return r; | |
518 | } | |
519 | ||
520 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); | |
521 | if (r < 0) | |
522 | return r; | |
523 | ||
524 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
525 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); | |
526 | if (r < 0) | |
527 | return r; | |
528 | ||
529 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
530 | if (r < 0) | |
531 | return r; | |
532 | ||
533 | r = sd_netlink_message_close_container(m); | |
534 | if (r < 0) | |
535 | return r; | |
536 | } else { | |
537 | r = sd_netlink_message_append_string(m, IFLA_INFO_KIND, netdev_kind_to_string(netdev->kind)); | |
538 | if (r < 0) | |
539 | return r; | |
540 | } | |
541 | ||
542 | r = sd_netlink_message_close_container(m); | |
543 | if (r < 0) | |
544 | return r; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static int independent_netdev_create(NetDev *netdev) { | |
550 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; | |
551 | int r; | |
552 | ||
553 | assert(netdev); | |
554 | ||
555 | /* create netdev */ | |
556 | if (NETDEV_VTABLE(netdev)->create) { | |
557 | r = NETDEV_VTABLE(netdev)->create(netdev); | |
558 | if (r < 0) | |
559 | return r; | |
560 | ||
561 | log_netdev_debug(netdev, "Created"); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
566 | if (r < 0) | |
567 | return r; | |
568 | ||
569 | r = netdev_create_message(netdev, NULL, m); | |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
573 | r = netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler, | |
574 | netdev_destroy_callback, netdev); | |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | netdev_ref(netdev); | |
579 | ||
580 | netdev->state = NETDEV_STATE_CREATING; | |
581 | log_netdev_debug(netdev, "Creating"); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | static int stacked_netdev_create(NetDev *netdev, Link *link, Request *req) { | |
586 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; | |
587 | int r; | |
588 | ||
589 | assert(netdev); | |
590 | assert(netdev->manager); | |
591 | assert(link); | |
592 | assert(req); | |
593 | ||
594 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
595 | if (r < 0) | |
596 | return r; | |
597 | ||
598 | r = netdev_create_message(netdev, link, m); | |
599 | if (r < 0) | |
600 | return r; | |
601 | ||
602 | r = request_call_netlink_async(netdev->manager->rtnl, m, req); | |
603 | if (r < 0) | |
604 | return r; | |
605 | ||
606 | netdev->state = NETDEV_STATE_CREATING; | |
607 | log_netdev_debug(netdev, "Creating"); | |
608 | return 0; | |
609 | } | |
610 | ||
611 | static bool link_is_ready_to_create_stacked_netdev_one(Link *link, bool allow_unmanaged) { | |
612 | assert(link); | |
613 | ||
614 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) | |
615 | return false; | |
616 | ||
617 | if (!link->network) | |
618 | return allow_unmanaged; | |
619 | ||
620 | if (link->set_link_messages > 0) | |
621 | return false; | |
622 | ||
623 | /* If stacked netdevs are created before the underlying interface being activated, then | |
624 | * the activation policy for the netdevs are ignored. See issue #22593. */ | |
625 | if (!link->activated) | |
626 | return false; | |
627 | ||
628 | return true; | |
629 | } | |
630 | ||
631 | static bool link_is_ready_to_create_stacked_netdev(Link *link) { | |
632 | return check_ready_for_all_sr_iov_ports(link, /* allow_unmanaged = */ false, | |
633 | link_is_ready_to_create_stacked_netdev_one); | |
634 | } | |
635 | ||
636 | static int netdev_is_ready_to_create(NetDev *netdev, Link *link) { | |
637 | assert(netdev); | |
638 | ||
639 | if (netdev->state != NETDEV_STATE_LOADING) | |
640 | return false; | |
641 | ||
642 | if (link && !link_is_ready_to_create_stacked_netdev(link)) | |
643 | return false; | |
644 | ||
645 | if (NETDEV_VTABLE(netdev)->is_ready_to_create) | |
646 | return NETDEV_VTABLE(netdev)->is_ready_to_create(netdev, link); | |
647 | ||
648 | return true; | |
649 | } | |
650 | ||
651 | static int stacked_netdev_process_request(Request *req, Link *link, void *userdata) { | |
652 | NetDev *netdev = ASSERT_PTR(userdata); | |
653 | int r; | |
654 | ||
655 | assert(req); | |
656 | assert(link); | |
657 | ||
658 | r = netdev_is_ready_to_create(netdev, link); | |
659 | if (r <= 0) | |
660 | return r; | |
661 | ||
662 | r = stacked_netdev_create(netdev, link, req); | |
663 | if (r < 0) | |
664 | return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); | |
665 | ||
666 | return 1; | |
667 | } | |
668 | ||
669 | static int create_stacked_netdev_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { | |
670 | int r; | |
671 | ||
672 | assert(m); | |
673 | assert(link); | |
674 | ||
675 | r = sd_netlink_message_get_errno(m); | |
676 | if (r < 0 && r != -EEXIST) { | |
677 | log_link_message_warning_errno(link, m, r, "Could not create stacked netdev"); | |
678 | link_enter_failed(link); | |
679 | return 0; | |
680 | } | |
681 | ||
682 | if (link->create_stacked_netdev_messages == 0) { | |
683 | link->stacked_netdevs_created = true; | |
684 | log_link_debug(link, "Stacked netdevs created."); | |
685 | link_check_ready(link); | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | int link_request_stacked_netdev(Link *link, NetDev *netdev) { | |
692 | int r; | |
693 | ||
694 | assert(link); | |
695 | assert(netdev); | |
696 | ||
697 | if (!netdev_is_stacked(netdev)) | |
698 | return -EINVAL; | |
699 | ||
700 | if (!IN_SET(netdev->state, NETDEV_STATE_LOADING, NETDEV_STATE_FAILED) || netdev->ifindex > 0) | |
701 | return 0; /* Already created. */ | |
702 | ||
703 | link->stacked_netdevs_created = false; | |
704 | r = link_queue_request_full(link, REQUEST_TYPE_NETDEV_STACKED, | |
705 | netdev, (mfree_func_t) netdev_unref, | |
706 | trivial_hash_func, trivial_compare_func, | |
707 | stacked_netdev_process_request, | |
708 | &link->create_stacked_netdev_messages, | |
709 | create_stacked_netdev_handler, NULL); | |
710 | if (r < 0) | |
711 | return log_link_error_errno(link, r, "Failed to request stacked netdev '%s': %m", | |
712 | netdev->ifname); | |
713 | if (r == 0) | |
714 | return 0; | |
715 | ||
716 | netdev_ref(netdev); | |
717 | log_link_debug(link, "Requested stacked netdev '%s'", netdev->ifname); | |
718 | return 1; | |
719 | } | |
720 | ||
721 | static int independent_netdev_process_request(Request *req, Link *link, void *userdata) { | |
722 | NetDev *netdev = ASSERT_PTR(userdata); | |
723 | int r; | |
724 | ||
725 | assert(!link); | |
726 | ||
727 | r = netdev_is_ready_to_create(netdev, NULL); | |
728 | if (r <= 0) | |
729 | return r; | |
730 | ||
731 | r = independent_netdev_create(netdev); | |
732 | if (r < 0) | |
733 | return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); | |
734 | ||
735 | return 1; | |
736 | } | |
737 | ||
738 | static int netdev_request_to_create(NetDev *netdev) { | |
739 | int r; | |
740 | ||
741 | assert(netdev); | |
742 | assert(netdev->manager); | |
743 | ||
744 | if (netdev->manager->test_mode) | |
745 | return 0; | |
746 | ||
747 | if (netdev_is_stacked(netdev)) | |
748 | return 0; | |
749 | ||
750 | r = netdev_is_ready_to_create(netdev, NULL); | |
751 | if (r < 0) | |
752 | return r; | |
753 | if (r > 0) { | |
754 | /* If the netdev has no dependency, then create it now. */ | |
755 | r = independent_netdev_create(netdev); | |
756 | if (r < 0) | |
757 | return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); | |
758 | ||
759 | } else { | |
760 | /* Otherwise, wait for the dependencies being resolved. */ | |
761 | r = netdev_queue_request(netdev, independent_netdev_process_request, NULL); | |
762 | if (r < 0) | |
763 | return log_netdev_warning_errno(netdev, r, "Failed to request to create netdev: %m"); | |
764 | } | |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
769 | int netdev_load_one(Manager *manager, const char *filename) { | |
770 | _cleanup_(netdev_unrefp) NetDev *netdev_raw = NULL, *netdev = NULL; | |
771 | const char *dropin_dirname; | |
772 | int r; | |
773 | ||
774 | assert(manager); | |
775 | assert(filename); | |
776 | ||
777 | r = null_or_empty_path(filename); | |
778 | if (r < 0) | |
779 | return log_warning_errno(r, "Failed to check if \"%s\" is empty: %m", filename); | |
780 | if (r > 0) { | |
781 | log_debug("Skipping empty file: %s", filename); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | netdev_raw = new(NetDev, 1); | |
786 | if (!netdev_raw) | |
787 | return log_oom(); | |
788 | ||
789 | *netdev_raw = (NetDev) { | |
790 | .n_ref = 1, | |
791 | .kind = _NETDEV_KIND_INVALID, | |
792 | .state = _NETDEV_STATE_INVALID, /* an invalid state means done() of the implementation won't be called on destruction */ | |
793 | }; | |
794 | ||
795 | dropin_dirname = strjoina(basename(filename), ".d"); | |
796 | r = config_parse_many( | |
797 | STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname, /* root = */ NULL, | |
798 | NETDEV_COMMON_SECTIONS NETDEV_OTHER_SECTIONS, | |
799 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
800 | CONFIG_PARSE_WARN, | |
801 | netdev_raw, | |
802 | NULL, | |
803 | NULL); | |
804 | if (r < 0) | |
805 | return r; /* config_parse_many() logs internally. */ | |
806 | ||
807 | /* skip out early if configuration does not match the environment */ | |
808 | if (!condition_test_list(netdev_raw->conditions, environ, NULL, NULL, NULL)) { | |
809 | log_debug("%s: Conditions in the file do not match the system environment, skipping.", filename); | |
810 | return 0; | |
811 | } | |
812 | ||
813 | if (netdev_raw->kind == _NETDEV_KIND_INVALID) | |
814 | return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev has no Kind= configured in \"%s\", ignoring.", filename); | |
815 | ||
816 | if (!netdev_raw->ifname) | |
817 | return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev without Name= configured in \"%s\", ignoring.", filename); | |
818 | ||
819 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); | |
820 | if (!netdev) | |
821 | return log_oom(); | |
822 | ||
823 | netdev->n_ref = 1; | |
824 | netdev->manager = manager; | |
825 | netdev->kind = netdev_raw->kind; | |
826 | netdev->state = NETDEV_STATE_LOADING; /* we initialize the state here for the first time, | |
827 | so that done() will be called on destruction */ | |
828 | ||
829 | if (NETDEV_VTABLE(netdev)->init) | |
830 | NETDEV_VTABLE(netdev)->init(netdev); | |
831 | ||
832 | r = config_parse_many( | |
833 | STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname, /* root = */ NULL, | |
834 | NETDEV_VTABLE(netdev)->sections, | |
835 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
836 | CONFIG_PARSE_WARN, | |
837 | netdev, NULL, NULL); | |
838 | if (r < 0) | |
839 | return r; /* config_parse_many() logs internally. */ | |
840 | ||
841 | /* verify configuration */ | |
842 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
843 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
844 | if (r < 0) | |
845 | return r; /* config_verify() logs internally. */ | |
846 | } | |
847 | ||
848 | netdev->filename = strdup(filename); | |
849 | if (!netdev->filename) | |
850 | return log_oom(); | |
851 | ||
852 | r = hashmap_ensure_put(&netdev->manager->netdevs, &string_hash_ops, netdev->ifname, netdev); | |
853 | if (r == -ENOMEM) | |
854 | return log_oom(); | |
855 | if (r == -EEXIST) { | |
856 | NetDev *n = hashmap_get(netdev->manager->netdevs, netdev->ifname); | |
857 | ||
858 | assert(n); | |
859 | if (!streq(netdev->filename, n->filename)) | |
860 | log_netdev_warning_errno(netdev, r, | |
861 | "Device was already configured by \"%s\", ignoring %s.", | |
862 | n->filename, netdev->filename); | |
863 | ||
864 | /* Clear ifname before netdev_free() is called. Otherwise, the NetDev object 'n' is | |
865 | * removed from the hashmap 'manager->netdevs'. */ | |
866 | netdev->ifname = mfree(netdev->ifname); | |
867 | return -EEXIST; | |
868 | } | |
869 | assert(r > 0); | |
870 | ||
871 | log_netdev_debug(netdev, "loaded \"%s\"", netdev_kind_to_string(netdev->kind)); | |
872 | ||
873 | r = netdev_request_to_create(netdev); | |
874 | if (r < 0) | |
875 | return r; /* netdev_request_to_create() logs internally. */ | |
876 | ||
877 | TAKE_PTR(netdev); | |
878 | return 0; | |
879 | } | |
880 | ||
881 | int netdev_load(Manager *manager, bool reload) { | |
882 | _cleanup_strv_free_ char **files = NULL; | |
883 | int r; | |
884 | ||
885 | assert(manager); | |
886 | ||
887 | if (!reload) | |
888 | hashmap_clear_with_destructor(manager->netdevs, netdev_unref); | |
889 | ||
890 | r = conf_files_list_strv(&files, ".netdev", NULL, 0, NETWORK_DIRS); | |
891 | if (r < 0) | |
892 | return log_error_errno(r, "Failed to enumerate netdev files: %m"); | |
893 | ||
894 | STRV_FOREACH(f, files) | |
895 | (void) netdev_load_one(manager, *f); | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
900 | int config_parse_netdev_kind( | |
901 | const char *unit, | |
902 | const char *filename, | |
903 | unsigned line, | |
904 | const char *section, | |
905 | unsigned section_line, | |
906 | const char *lvalue, | |
907 | int ltype, | |
908 | const char *rvalue, | |
909 | void *data, | |
910 | void *userdata) { | |
911 | ||
912 | NetDevKind k, *kind = ASSERT_PTR(data); | |
913 | ||
914 | assert(filename); | |
915 | assert(rvalue); | |
916 | ||
917 | k = netdev_kind_from_string(rvalue); | |
918 | if (k < 0) { | |
919 | log_syntax(unit, LOG_WARNING, filename, line, k, "Failed to parse netdev kind, ignoring assignment: %s", rvalue); | |
920 | return 0; | |
921 | } | |
922 | ||
923 | if (*kind != _NETDEV_KIND_INVALID && *kind != k) { | |
924 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
925 | "Specified netdev kind is different from the previous value '%s', ignoring assignment: %s", | |
926 | netdev_kind_to_string(*kind), rvalue); | |
927 | return 0; | |
928 | } | |
929 | ||
930 | *kind = k; | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | int config_parse_netdev_hw_addr( | |
936 | const char *unit, | |
937 | const char *filename, | |
938 | unsigned line, | |
939 | const char *section, | |
940 | unsigned section_line, | |
941 | const char *lvalue, | |
942 | int ltype, | |
943 | const char *rvalue, | |
944 | void *data, | |
945 | void *userdata) { | |
946 | ||
947 | struct hw_addr_data *hw_addr = ASSERT_PTR(data); | |
948 | ||
949 | assert(rvalue); | |
950 | ||
951 | if (streq(rvalue, "none")) { | |
952 | *hw_addr = HW_ADDR_NONE; | |
953 | return 0; | |
954 | } | |
955 | ||
956 | return config_parse_hw_addr(unit, filename, line, section, section_line, lvalue, ltype, rvalue, data, userdata); | |
957 | } |