src/network/networkd-netdev.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <net/if.h>
  23
  24 #include "networkd-netdev.h"
  25 #include "networkd-link.h"
  26 #include "network-internal.h"
  27 #include "path-util.h"
  28 #include "conf-files.h"
  29 #include "conf-parser.h"
  30 #include "list.h"
  31 #include "siphash24.h"
  32
  33 const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
  34         [NETDEV_KIND_BRIDGE] = &bridge_vtable,
  35         [NETDEV_KIND_BOND] = &bond_vtable,
  36         [NETDEV_KIND_VLAN] = &vlan_vtable,
  37         [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
  38         [NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
  39         [NETDEV_KIND_VXLAN] = &vxlan_vtable,
  40         [NETDEV_KIND_IPIP] = &ipip_vtable,
  41         [NETDEV_KIND_GRE] = &gre_vtable,
  42         [NETDEV_KIND_GRETAP] = &gretap_vtable,
  43         [NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
  44         [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
  45         [NETDEV_KIND_SIT] = &sit_vtable,
  46         [NETDEV_KIND_VTI] = &vti_vtable,
  47         [NETDEV_KIND_VETH] = &veth_vtable,
  48         [NETDEV_KIND_DUMMY] = &dummy_vtable,
  49         [NETDEV_KIND_TUN] = &tun_vtable,
  50         [NETDEV_KIND_TAP] = &tap_vtable,
  51         [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
  52 };
  53
  54 static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
  55         [NETDEV_KIND_BRIDGE] = "bridge",
  56         [NETDEV_KIND_BOND] = "bond",
  57         [NETDEV_KIND_VLAN] = "vlan",
  58         [NETDEV_KIND_MACVLAN] = "macvlan",
  59         [NETDEV_KIND_IPVLAN] = "ipvlan",
  60         [NETDEV_KIND_VXLAN] = "vxlan",
  61         [NETDEV_KIND_IPIP] = "ipip",
  62         [NETDEV_KIND_GRE] = "gre",
  63         [NETDEV_KIND_GRETAP] = "gretap",
  64         [NETDEV_KIND_IP6GRE] = "ip6gre",
  65         [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
  66         [NETDEV_KIND_SIT] = "sit",
  67         [NETDEV_KIND_VETH] = "veth",
  68         [NETDEV_KIND_VTI] = "vti",
  69         [NETDEV_KIND_DUMMY] = "dummy",
  70         [NETDEV_KIND_TUN] = "tun",
  71         [NETDEV_KIND_TAP] = "tap",
  72         [NETDEV_KIND_IP6TNL] = "ip6tnl",
  73 };
  74
  75 DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
  76 DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
  77
  78 static void netdev_cancel_callbacks(NetDev *netdev) {
  79         _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
  80         netdev_join_callback *callback;
  81
  82         if (!netdev)
  83                 return;
  84
  85         rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
  86
  87         while ((callback = netdev->callbacks)) {
  88                 if (m) {
  89                         assert(callback->link);
  90                         assert(callback->callback);
  91                         assert(netdev->manager);
  92                         assert(netdev->manager->rtnl);
  93
  94                         callback->callback(netdev->manager->rtnl, m, link);
  95                 }
  96
  97                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
  98                 free(callback);
  99         }
 100 }
 101
 102 static void netdev_free(NetDev *netdev) {
 103         if (!netdev)
 104                 return;
 105
 106         netdev_cancel_callbacks(netdev);
 107
 108         if (netdev->ifname)
 109                 hashmap_remove(netdev->manager->netdevs, netdev->ifname);
 110
 111         free(netdev->filename);
 112
 113         free(netdev->description);
 114         free(netdev->ifname);
 115         free(netdev->mac);
 116
 117         condition_free_list(netdev->match_host);
 118         condition_free_list(netdev->match_virt);
 119         condition_free_list(netdev->match_kernel);
 120         condition_free_list(netdev->match_arch);
 121
 122         if (NETDEV_VTABLE(netdev) &&
 123             NETDEV_VTABLE(netdev)->done)
 124                 NETDEV_VTABLE(netdev)->done(netdev);
 125
 126         free(netdev);
 127 }
 128
 129 NetDev *netdev_unref(NetDev *netdev) {
 130         if (netdev && (-- netdev->n_ref <= 0))
 131                 netdev_free(netdev);
 132
 133         return NULL;
 134 }
 135
 136 NetDev *netdev_ref(NetDev *netdev) {
 137         if (netdev)
 138                 assert_se(++ netdev->n_ref >= 2);
 139
 140         return netdev;
 141 }
 142
 143 void netdev_drop(NetDev *netdev) {
 144         if (!netdev || netdev->state == NETDEV_STATE_LINGER)
 145                 return;
 146
 147         netdev->state = NETDEV_STATE_LINGER;
 148
 149         log_netdev_debug(netdev, "netdev removed");
 150
 151         netdev_cancel_callbacks(netdev);
 152
 153         netdev_unref(netdev);
 154
 155         return;
 156 }
 157
 158 int netdev_get(Manager *manager, const char *name, NetDev **ret) {
 159         NetDev *netdev;
 160
 161         assert(manager);
 162         assert(name);
 163         assert(ret);
 164
 165         netdev = hashmap_get(manager->netdevs, name);
 166         if (!netdev) {
 167                 *ret = NULL;
 168                 return -ENOENT;
 169         }
 170
 171         *ret = netdev;
 172
 173         return 0;
 174 }
 175
 176 static int netdev_enter_failed(NetDev *netdev) {
 177         netdev->state = NETDEV_STATE_FAILED;
 178
 179         return 0;
 180 }
 181
 182 static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_rtnl_message_handler_t callback) {
 183         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
 184         int r;
 185
 186         assert(netdev);
 187         assert(netdev->state == NETDEV_STATE_READY);
 188         assert(netdev->manager);
 189         assert(netdev->manager->rtnl);
 190         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
 191         assert(link);
 192         assert(callback);
 193
 194         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req,
 195                                      RTM_SETLINK, link->ifindex);
 196         if (r < 0) {
 197                 log_netdev_error(netdev,
 198                                  "Could not allocate RTM_SETLINK message: %s",
 199                                  strerror(-r));
 200                 return r;
 201         }
 202
 203         r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
 204         if (r < 0) {
 205                 log_netdev_error(netdev,
 206                                  "Could not append IFLA_MASTER attribute: %s",
 207                                  strerror(-r));
 208                 return r;
 209         }
 210
 211         r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
 212         if (r < 0) {
 213                 log_netdev_error(netdev,
 214                                  "Could not send rtnetlink message: %s",
 215                                  strerror(-r));
 216                 return r;
 217         }
 218
 219         link_ref(link);
 220
 221         log_netdev_debug(netdev, "enslaving link '%s'", link->ifname);
 222
 223         return 0;
 224 }
 225
 226 static int netdev_enter_ready(NetDev *netdev) {
 227         netdev_join_callback *callback, *callback_next;
 228         int r;
 229
 230         assert(netdev);
 231         assert(netdev->ifname);
 232
 233         if (netdev->state != NETDEV_STATE_CREATING)
 234                 return 0;
 235
 236         netdev->state = NETDEV_STATE_READY;
 237
 238         log_info_netdev(netdev, "netdev ready");
 239
 240         LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
 241                 /* enslave the links that were attempted to be enslaved before the
 242                  * link was ready */
 243                 r = netdev_enslave_ready(netdev, callback->link, callback->callback);
 244                 if (r < 0)
 245                         return r;
 246
 247                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 248                 link_unref(callback->link);
 249                 free(callback);
 250         }
 251
 252         return 0;
 253 }
 254
 255 /* callback for netdev's created without a backing Link */
 256 static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 257         _cleanup_netdev_unref_ NetDev *netdev = userdata;
 258         int r;
 259
 260         assert(netdev->state != _NETDEV_STATE_INVALID);
 261
 262         r = sd_rtnl_message_get_errno(m);
 263         if (r == -EEXIST)
 264                 log_netdev_debug(netdev, "netdev exists, using existing");
 265         else if (r < 0) {
 266                 log_warning_netdev(netdev, "netdev could not be created: %s", strerror(-r));
 267                 netdev_drop(netdev);
 268
 269                 return 1;
 270         }
 271
 272         log_netdev_debug(netdev, "created");
 273
 274         return 1;
 275 }
 276
 277 int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
 278         int r;
 279
 280         assert(netdev);
 281         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
 282
 283         if (netdev->state == NETDEV_STATE_READY) {
 284                 r = netdev_enslave_ready(netdev, link, callback);
 285                 if (r < 0)
 286                         return r;
 287         } else {
 288                 /* the netdev is not yet read, save this request for when it is */
 289                 netdev_join_callback *cb;
 290
 291                 cb = new0(netdev_join_callback, 1);
 292                 if (!cb)
 293                         return log_oom();
 294
 295                 cb->callback = callback;
 296                 cb->link = link;
 297                 link_ref(link);
 298
 299                 LIST_PREPEND(callbacks, netdev->callbacks, cb);
 300
 301                 log_netdev_debug(netdev, "will enslave '%s', when reday",
 302                                  link->ifname);
 303         }
 304
 305         return 0;
 306 }
 307
 308 int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
 309         uint16_t type;
 310         const char *kind;
 311         const char *received_kind;
 312         const char *received_name;
 313         int r, ifindex;
 314
 315         assert(netdev);
 316         assert(message);
 317
 318         r = sd_rtnl_message_get_type(message, &type);
 319         if (r < 0) {
 320                 log_netdev_error(netdev, "Could not get rtnl message type");
 321                 return r;
 322         }
 323
 324         if (type != RTM_NEWLINK) {
 325                 log_netdev_error(netdev, "Can not set ifindex from unexpected rtnl message type");
 326                 return -EINVAL;
 327         }
 328
 329         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 330         if (r < 0) {
 331                 log_netdev_error(netdev, "Could not get ifindex: %s", strerror(-r));
 332                 netdev_enter_failed(netdev);
 333                 return r;
 334         } else if (ifindex <= 0) {
 335                 log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
 336                 netdev_enter_failed(netdev);
 337                 return r;
 338         }
 339
 340         if (netdev->ifindex > 0) {
 341                 if (netdev->ifindex != ifindex) {
 342                         log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
 343                                          ifindex, netdev->ifindex);
 344                         netdev_enter_failed(netdev);
 345                         return -EEXIST;
 346                 } else
 347                         /* ifindex already set to the same for this netdev */
 348                         return 0;
 349         }
 350
 351         r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &received_name);
 352         if (r < 0) {
 353                 log_netdev_error(netdev, "Could not get IFNAME");
 354                 return r;
 355         }
 356
 357         if (!streq(netdev->ifname, received_name)) {
 358                 log_netdev_error(netdev, "Received newlink with wrong IFNAME %s",
 359                                  received_name);
 360                 netdev_enter_failed(netdev);
 361                 return r;
 362         }
 363
 364         r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO);
 365         if (r < 0) {
 366                 log_netdev_error(netdev, "Could not get LINKINFO");
 367                 return r;
 368         }
 369
 370         r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind);
 371         if (r < 0) {
 372                 log_netdev_error(netdev, "Could not get KIND");
 373                 return r;
 374         }
 375
 376         r = sd_rtnl_message_exit_container(message);
 377         if (r < 0) {
 378                 log_netdev_error(netdev, "Could not exit container");
 379                 return r;
 380         }
 381
 382         if (netdev->kind == NETDEV_KIND_TAP)
 383                 /* the kernel does not distinguish between tun and tap */
 384                 kind = "tun";
 385         else {
 386                 kind = netdev_kind_to_string(netdev->kind);
 387                 if (!kind) {
 388                         log_netdev_error(netdev, "Could not get kind");
 389                         netdev_enter_failed(netdev);
 390                         return -EINVAL;
 391                 }
 392         }
 393
 394         if (!streq(kind, received_kind)) {
 395                 log_netdev_error(netdev,
 396                                  "Received newlink with wrong KIND %s, "
 397                                  "expected %s", received_kind, kind);
 398                 netdev_enter_failed(netdev);
 399                 return r;
 400         }
 401
 402         netdev->ifindex = ifindex;
 403
 404         log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
 405
 406         netdev_enter_ready(netdev);
 407
 408         return 0;
 409 }
 410
 411 #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
 412
 413 int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
 414         _cleanup_free_ struct ether_addr *mac = NULL;
 415         uint8_t result[8];
 416         size_t l, sz;
 417         uint8_t *v;
 418         int r;
 419
 420         assert(ifname);
 421         assert(ret);
 422
 423         mac = new0(struct ether_addr, 1);
 424         if (!mac)
 425                 return -ENOMEM;
 426
 427         l = strlen(ifname);
 428         sz = sizeof(sd_id128_t) + l;
 429         v = alloca(sz);
 430
 431         /* fetch some persistent data unique to the machine */
 432         r = sd_id128_get_machine((sd_id128_t*) v);
 433         if (r < 0)
 434                 return r;
 435
 436         /* combine with some data unique (on this machine) to this
 437          * netdev */
 438         memcpy(v + sizeof(sd_id128_t), ifname, l);
 439
 440         /* Let's hash the host machine ID plus the container name. We
 441          * use a fixed, but originally randomly created hash key here. */
 442         siphash24(result, v, sz, HASH_KEY.bytes);
 443
 444         assert_cc(ETH_ALEN <= sizeof(result));
 445         memcpy(mac->ether_addr_octet, result, ETH_ALEN);
 446
 447         /* see eth_random_addr in the kernel */
 448         mac->ether_addr_octet[0] &= 0xfe;        /* clear multicast bit */
 449         mac->ether_addr_octet[0] |= 0x02;        /* set local assignment bit (IEEE802) */
 450
 451         *ret = mac;
 452         mac = NULL;
 453
 454         return 0;
 455 }
 456
 457 static int netdev_create(NetDev *netdev, Link *link,
 458                          sd_rtnl_message_handler_t callback) {
 459         int r;
 460
 461         assert(netdev);
 462         assert(!link || callback);
 463
 464         /* create netdev */
 465         if (NETDEV_VTABLE(netdev)->create) {
 466                 assert(!link);
 467
 468                 r = NETDEV_VTABLE(netdev)->create(netdev);
 469                 if (r < 0)
 470                         return r;
 471
 472                 log_netdev_debug(netdev, "created");
 473         } else {
 474                 _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
 475
 476                 r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
 477                 if (r < 0) {
 478                         log_netdev_error(netdev,
 479                                          "Could not allocate RTM_NEWLINK message: %s",
 480                                          strerror(-r));
 481                         return r;
 482                 }
 483
 484                 r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
 485                 if (r < 0) {
 486                         log_netdev_error(netdev,
 487                                          "Could not append IFLA_IFNAME, attribute: %s",
 488                                          strerror(-r));
 489                         return r;
 490                 }
 491
 492                 if (netdev->mac) {
 493                         r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
 494                         if (r < 0) {
 495                                 log_netdev_error(netdev,
 496                                                  "Could not append IFLA_ADDRESS attribute: %s",
 497                                                  strerror(-r));
 498                             return r;
 499                         }
 500                 }
 501
 502                 if (netdev->mtu) {
 503                         r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
 504                         if (r < 0) {
 505                                 log_netdev_error(netdev,
 506                                                  "Could not append IFLA_MTU attribute: %s",
 507                                                  strerror(-r));
 508                                 return r;
 509                         }
 510                 }
 511
 512                 if (link) {
 513                         r = sd_rtnl_message_append_u32(m, IFLA_LINK, link->ifindex);
 514                         if (r < 0) {
 515                                 log_netdev_error(netdev,
 516                                                  "Could not append IFLA_LINK attribute: %s",
 517                                                  strerror(-r));
 518                                 return r;
 519                         }
 520                 }
 521
 522                 r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
 523                 if (r < 0) {
 524                         log_netdev_error(netdev,
 525                                          "Could not append IFLA_LINKINFO attribute: %s",
 526                                          strerror(-r));
 527                         return r;
 528                 }
 529
 530                 r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
 531                                                          netdev_kind_to_string(netdev->kind));
 532                 if (r < 0) {
 533                         log_netdev_error(netdev,
 534                                          "Could not append IFLA_INFO_DATA attribute: %s",
 535                                          strerror(-r));
 536                         return r;
 537                 }
 538
 539                 if (NETDEV_VTABLE(netdev)->fill_message_create) {
 540                         r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
 541                         if (r < 0)
 542                                 return r;
 543                 }
 544
 545                 r = sd_rtnl_message_close_container(m);
 546                 if (r < 0) {
 547                         log_netdev_error(netdev,
 548                                          "Could not append IFLA_LINKINFO attribute: %s",
 549                                          strerror(-r));
 550                         return r;
 551                 }
 552
 553                 r = sd_rtnl_message_close_container(m);
 554                 if (r < 0) {
 555                         log_netdev_error(netdev,
 556                                          "Could not append IFLA_LINKINFO attribute: %s",
 557                                          strerror(-r));
 558                         return r;
 559                 }
 560
 561
 562                 if (link) {
 563                         r = sd_rtnl_call_async(netdev->manager->rtnl, m,
 564                                                callback, link, 0, NULL);
 565                         if (r < 0) {
 566                                 log_netdev_error(netdev,
 567                                                  "Could not send rtnetlink message: %s",
 568                                                  strerror(-r));
 569                                 return r;
 570                         }
 571
 572                         link_ref(link);
 573                 } else {
 574                         r = sd_rtnl_call_async(netdev->manager->rtnl, m,
 575                                                netdev_create_handler, netdev, 0,
 576                                                NULL);
 577                         if (r < 0) {
 578                                 log_netdev_error(netdev,
 579                                                  "Could not send rtnetlink message: %s",
 580                                                  strerror(-r));
 581                                 return r;
 582                         }
 583
 584                         netdev_ref(netdev);
 585                 }
 586
 587                 netdev->state = NETDEV_STATE_CREATING;
 588
 589                 log_netdev_debug(netdev, "creating");
 590         }
 591
 592         return 0;
 593 }
 594
 595 /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
 596 int netdev_join(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
 597         int r;
 598
 599         assert(netdev);
 600         assert(netdev->manager);
 601         assert(netdev->manager->rtnl);
 602         assert(NETDEV_VTABLE(netdev));
 603
 604         switch (NETDEV_VTABLE(netdev)->create_type) {
 605         case NETDEV_CREATE_MASTER:
 606                 r = netdev_enslave(netdev, link, callback);
 607                 if (r < 0)
 608                         return r;
 609
 610                 break;
 611         case NETDEV_CREATE_STACKED:
 612                 r = netdev_create(netdev, link, callback);
 613                 if (r < 0)
 614                         return r;
 615
 616                 break;
 617         default:
 618                 assert_not_reached("Can not join independent netdev");
 619         }
 620
 621         return 0;
 622 }
 623
 624 static int netdev_load_one(Manager *manager, const char *filename) {
 625         _cleanup_netdev_unref_ NetDev *netdev = NULL;
 626         _cleanup_free_ NetDev *netdev_raw = NULL;
 627         _cleanup_fclose_ FILE *file = NULL;
 628         int r;
 629
 630         assert(manager);
 631         assert(filename);
 632
 633         file = fopen(filename, "re");
 634         if (!file) {
 635                 if (errno == ENOENT)
 636                         return 0;
 637                 else
 638                         return -errno;
 639         }
 640
 641         if (null_or_empty_fd(fileno(file))) {
 642                 log_debug("Skipping empty file: %s", filename);
 643                 return 0;
 644         }
 645
 646         netdev_raw = new0(NetDev, 1);
 647         if (!netdev_raw)
 648                 return log_oom();
 649
 650         netdev_raw->kind = _NETDEV_KIND_INVALID;
 651
 652         r = config_parse(NULL, filename, file,
 653                          "Match\0NetDev\0",
 654                          config_item_perf_lookup, network_netdev_gperf_lookup,
 655                          true, false, true, netdev_raw);
 656         if (r < 0)
 657                 return r;
 658
 659         r = fseek(file, 0, SEEK_SET);
 660         if (r < 0)
 661                 return -errno;
 662
 663         /* skip out early if configuration does not match the environment */
 664         if (net_match_config(NULL, NULL, NULL, NULL, NULL,
 665                              netdev_raw->match_host, netdev_raw->match_virt,
 666                              netdev_raw->match_kernel, netdev_raw->match_arch,
 667                              NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
 668                 return 0;
 669
 670         if (!NETDEV_VTABLE(netdev_raw)) {
 671                 log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename);
 672                 return 0;
 673         }
 674
 675         if (!netdev_raw->ifname) {
 676                 log_warning("NetDev without Name configured in %s. Ignoring", filename);
 677                 return 0;
 678         }
 679
 680         netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
 681         if (!netdev)
 682                 return log_oom();
 683
 684         netdev->n_ref = 1;
 685         netdev->manager = manager;
 686         netdev->state = _NETDEV_STATE_INVALID;
 687         netdev->kind = netdev_raw->kind;
 688         netdev->ifname = netdev_raw->ifname;
 689
 690         if (NETDEV_VTABLE(netdev)->init)
 691                 NETDEV_VTABLE(netdev)->init(netdev);
 692
 693         r = config_parse(NULL, filename, file,
 694                          NETDEV_VTABLE(netdev)->sections,
 695                          config_item_perf_lookup, network_netdev_gperf_lookup,
 696                          false, false, false, netdev);
 697         if (r < 0)
 698                 return r;
 699
 700         /* verify configuration */
 701         if (NETDEV_VTABLE(netdev)->config_verify) {
 702                 r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
 703                 if (r < 0)
 704                         return 0;
 705         }
 706
 707         netdev->filename = strdup(filename);
 708         if (!netdev->filename)
 709                 return log_oom();
 710
 711         if (!netdev->mac) {
 712                 r = netdev_get_mac(netdev->ifname, &netdev->mac);
 713                 if (r < 0) {
 714                         log_error("Failed to generate predictable MAC address for %s",
 715                                   netdev->ifname);
 716                         return r;
 717                 }
 718         }
 719
 720         r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
 721         if (r < 0)
 722                 return r;
 723
 724         LIST_HEAD_INIT(netdev->callbacks);
 725
 726         log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
 727
 728         switch (NETDEV_VTABLE(netdev)->create_type) {
 729         case NETDEV_CREATE_MASTER:
 730         case NETDEV_CREATE_INDEPENDENT:
 731                 r = netdev_create(netdev, NULL, NULL);
 732                 if (r < 0)
 733                         return 0;
 734
 735                 break;
 736         default:
 737                 break;
 738         }
 739
 740         netdev = NULL;
 741
 742         return 0;
 743 }
 744
 745 int netdev_load(Manager *manager) {
 746         NetDev *netdev;
 747         char **files, **f;
 748         int r;
 749
 750         assert(manager);
 751
 752         while ((netdev = hashmap_first(manager->netdevs)))
 753                 netdev_unref(netdev);
 754
 755         r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs);
 756         if (r < 0)
 757                 return log_error_errno(r, "Failed to enumerate netdev files: %m");
 758
 759         STRV_FOREACH_BACKWARDS(f, files) {
 760                 r = netdev_load_one(manager, *f);
 761                 if (r < 0)
 762                         return r;
 763         }
 764
 765         strv_free(files);
 766
 767         return 0;
 768 }