src/network/networkd-netdev.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Tom Gundersen <teg@jklm.no>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <net/if.h>
  21
  22 #include "alloc-util.h"
  23 #include "conf-files.h"
  24 #include "conf-parser.h"
  25 #include "fd-util.h"
  26 #include "list.h"
  27 #include "netlink-util.h"
  28 #include "network-internal.h"
  29 #include "networkd-netdev.h"
  30 #include "networkd.h"
  31 #include "siphash24.h"
  32 #include "stat-util.h"
  33 #include "string-table.h"
  34 #include "string-util.h"
  35
  36 const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
  37
  38         [NETDEV_KIND_BRIDGE] = &bridge_vtable,
  39         [NETDEV_KIND_BOND] = &bond_vtable,
  40         [NETDEV_KIND_VLAN] = &vlan_vtable,
  41         [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
  42         [NETDEV_KIND_MACVTAP] = &macvtap_vtable,
  43         [NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
  44         [NETDEV_KIND_VXLAN] = &vxlan_vtable,
  45         [NETDEV_KIND_IPIP] = &ipip_vtable,
  46         [NETDEV_KIND_GRE] = &gre_vtable,
  47         [NETDEV_KIND_GRETAP] = &gretap_vtable,
  48         [NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
  49         [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
  50         [NETDEV_KIND_SIT] = &sit_vtable,
  51         [NETDEV_KIND_VTI] = &vti_vtable,
  52         [NETDEV_KIND_VTI6] = &vti6_vtable,
  53         [NETDEV_KIND_VETH] = &veth_vtable,
  54         [NETDEV_KIND_DUMMY] = &dummy_vtable,
  55         [NETDEV_KIND_TUN] = &tun_vtable,
  56         [NETDEV_KIND_TAP] = &tap_vtable,
  57         [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
  58         [NETDEV_KIND_VRF] = &vrf_vtable,
  59         [NETDEV_KIND_VCAN] = &vcan_vtable,
  60 };
  61
  62 static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
  63         [NETDEV_KIND_BRIDGE] = "bridge",
  64         [NETDEV_KIND_BOND] = "bond",
  65         [NETDEV_KIND_VLAN] = "vlan",
  66         [NETDEV_KIND_MACVLAN] = "macvlan",
  67         [NETDEV_KIND_MACVTAP] = "macvtap",
  68         [NETDEV_KIND_IPVLAN] = "ipvlan",
  69         [NETDEV_KIND_VXLAN] = "vxlan",
  70         [NETDEV_KIND_IPIP] = "ipip",
  71         [NETDEV_KIND_GRE] = "gre",
  72         [NETDEV_KIND_GRETAP] = "gretap",
  73         [NETDEV_KIND_IP6GRE] = "ip6gre",
  74         [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
  75         [NETDEV_KIND_SIT] = "sit",
  76         [NETDEV_KIND_VETH] = "veth",
  77         [NETDEV_KIND_VTI] = "vti",
  78         [NETDEV_KIND_VTI6] = "vti6",
  79         [NETDEV_KIND_DUMMY] = "dummy",
  80         [NETDEV_KIND_TUN] = "tun",
  81         [NETDEV_KIND_TAP] = "tap",
  82         [NETDEV_KIND_IP6TNL] = "ip6tnl",
  83         [NETDEV_KIND_VRF] = "vrf",
  84         [NETDEV_KIND_VCAN] = "vcan",
  85 };
  86
  87 DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
  88 DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
  89
  90 static void netdev_cancel_callbacks(NetDev *netdev) {
  91         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
  92         netdev_join_callback *callback;
  93
  94         if (!netdev)
  95                 return;
  96
  97         rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
  98
  99         while ((callback = netdev->callbacks)) {
 100                 if (m) {
 101                         assert(callback->link);
 102                         assert(callback->callback);
 103                         assert(netdev->manager);
 104                         assert(netdev->manager->rtnl);
 105
 106                         callback->callback(netdev->manager->rtnl, m, callback->link);
 107                 }
 108
 109                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 110                 link_unref(callback->link);
 111                 free(callback);
 112         }
 113 }
 114
 115 static void netdev_free(NetDev *netdev) {
 116         if (!netdev)
 117                 return;
 118
 119         netdev_cancel_callbacks(netdev);
 120
 121         if (netdev->ifname)
 122                 hashmap_remove(netdev->manager->netdevs, netdev->ifname);
 123
 124         free(netdev->filename);
 125
 126         free(netdev->description);
 127         free(netdev->ifname);
 128         free(netdev->mac);
 129
 130         condition_free_list(netdev->match_host);
 131         condition_free_list(netdev->match_virt);
 132         condition_free_list(netdev->match_kernel);
 133         condition_free_list(netdev->match_arch);
 134
 135         if (NETDEV_VTABLE(netdev) &&
 136             NETDEV_VTABLE(netdev)->done)
 137                 NETDEV_VTABLE(netdev)->done(netdev);
 138
 139         free(netdev);
 140 }
 141
 142 NetDev *netdev_unref(NetDev *netdev) {
 143         if (netdev && (-- netdev->n_ref <= 0))
 144                 netdev_free(netdev);
 145
 146         return NULL;
 147 }
 148
 149 NetDev *netdev_ref(NetDev *netdev) {
 150         if (netdev)
 151                 assert_se(++ netdev->n_ref >= 2);
 152
 153         return netdev;
 154 }
 155
 156 void netdev_drop(NetDev *netdev) {
 157         if (!netdev || netdev->state == NETDEV_STATE_LINGER)
 158                 return;
 159
 160         netdev->state = NETDEV_STATE_LINGER;
 161
 162         log_netdev_debug(netdev, "netdev removed");
 163
 164         netdev_cancel_callbacks(netdev);
 165
 166         netdev_unref(netdev);
 167
 168         return;
 169 }
 170
 171 int netdev_get(Manager *manager, const char *name, NetDev **ret) {
 172         NetDev *netdev;
 173
 174         assert(manager);
 175         assert(name);
 176         assert(ret);
 177
 178         netdev = hashmap_get(manager->netdevs, name);
 179         if (!netdev) {
 180                 *ret = NULL;
 181                 return -ENOENT;
 182         }
 183
 184         *ret = netdev;
 185
 186         return 0;
 187 }
 188
 189 static int netdev_enter_failed(NetDev *netdev) {
 190         netdev->state = NETDEV_STATE_FAILED;
 191
 192         netdev_cancel_callbacks(netdev);
 193
 194         return 0;
 195 }
 196
 197 static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) {
 198         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 199         int r;
 200
 201         assert(netdev);
 202         assert(netdev->state == NETDEV_STATE_READY);
 203         assert(netdev->manager);
 204         assert(netdev->manager->rtnl);
 205         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 206         assert(link);
 207         assert(callback);
 208
 209         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
 210         if (r < 0)
 211                 return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
 212
 213         r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
 214         if (r < 0)
 215                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
 216
 217         r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
 218         if (r < 0)
 219                 return log_netdev_error(netdev, "Could not send rtnetlink message: %m");
 220
 221         link_ref(link);
 222
 223         log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname);
 224
 225         return 0;
 226 }
 227
 228 static int netdev_enter_ready(NetDev *netdev) {
 229         netdev_join_callback *callback, *callback_next;
 230         int r;
 231
 232         assert(netdev);
 233         assert(netdev->ifname);
 234
 235         if (netdev->state != NETDEV_STATE_CREATING)
 236                 return 0;
 237
 238         netdev->state = NETDEV_STATE_READY;
 239
 240         log_netdev_info(netdev, "netdev ready");
 241
 242         LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
 243                 /* enslave the links that were attempted to be enslaved before the
 244                  * link was ready */
 245                 r = netdev_enslave_ready(netdev, callback->link, callback->callback);
 246                 if (r < 0)
 247                         return r;
 248
 249                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 250                 link_unref(callback->link);
 251                 free(callback);
 252         }
 253
 254         if (NETDEV_VTABLE(netdev)->post_create)
 255                 NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL);
 256
 257         return 0;
 258 }
 259
 260 /* callback for netdev's created without a backing Link */
 261 static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 262         _cleanup_netdev_unref_ NetDev *netdev = userdata;
 263         int r;
 264
 265         assert(netdev->state != _NETDEV_STATE_INVALID);
 266
 267         r = sd_netlink_message_get_errno(m);
 268         if (r == -EEXIST)
 269                 log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
 270         else if (r < 0) {
 271                 log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
 272                 netdev_drop(netdev);
 273
 274                 return 1;
 275         }
 276
 277         log_netdev_debug(netdev, "Created");
 278
 279         return 1;
 280 }
 281
 282 int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 283         int r;
 284
 285         assert(netdev);
 286         assert(netdev->manager);
 287         assert(netdev->manager->rtnl);
 288         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 289
 290         if (netdev->state == NETDEV_STATE_READY) {
 291                 r = netdev_enslave_ready(netdev, link, callback);
 292                 if (r < 0)
 293                         return r;
 294         } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) {
 295                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 296
 297                 r = rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
 298                 if (r >= 0)
 299                         callback(netdev->manager->rtnl, m, link);
 300         } else {
 301                 /* the netdev is not yet read, save this request for when it is */
 302                 netdev_join_callback *cb;
 303
 304                 cb = new0(netdev_join_callback, 1);
 305                 if (!cb)
 306                         return log_oom();
 307
 308                 cb->callback = callback;
 309                 cb->link = link;
 310                 link_ref(link);
 311
 312                 LIST_PREPEND(callbacks, netdev->callbacks, cb);
 313
 314                 log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname);
 315         }
 316
 317         return 0;
 318 }
 319
 320 int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
 321         uint16_t type;
 322         const char *kind;
 323         const char *received_kind;
 324         const char *received_name;
 325         int r, ifindex;
 326
 327         assert(netdev);
 328         assert(message);
 329
 330         r = sd_netlink_message_get_type(message, &type);
 331         if (r < 0)
 332                 return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
 333
 334         if (type != RTM_NEWLINK) {
 335                 log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type.");
 336                 return -EINVAL;
 337         }
 338
 339         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 340         if (r < 0) {
 341                 log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
 342                 netdev_enter_failed(netdev);
 343                 return r;
 344         } else if (ifindex <= 0) {
 345                 log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
 346                 netdev_enter_failed(netdev);
 347                 return -EINVAL;
 348         }
 349
 350         if (netdev->ifindex > 0) {
 351                 if (netdev->ifindex != ifindex) {
 352                         log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
 353                                          ifindex, netdev->ifindex);
 354                         netdev_enter_failed(netdev);
 355                         return -EEXIST;
 356                 } else
 357                         /* ifindex already set to the same for this netdev */
 358                         return 0;
 359         }
 360
 361         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
 362         if (r < 0)
 363                 return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
 364
 365         if (!streq(netdev->ifname, received_name)) {
 366                 log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
 367                 netdev_enter_failed(netdev);
 368                 return r;
 369         }
 370
 371         r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
 372         if (r < 0)
 373                 return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
 374
 375         r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
 376         if (r < 0)
 377                 return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
 378
 379         r = sd_netlink_message_exit_container(message);
 380         if (r < 0)
 381                 return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
 382
 383         if (netdev->kind == NETDEV_KIND_TAP)
 384                 /* the kernel does not distinguish between tun and tap */
 385                 kind = "tun";
 386         else {
 387                 kind = netdev_kind_to_string(netdev->kind);
 388                 if (!kind) {
 389                         log_netdev_error(netdev, "Could not get kind");
 390                         netdev_enter_failed(netdev);
 391                         return -EINVAL;
 392                 }
 393         }
 394
 395         if (!streq(kind, received_kind)) {
 396                 log_netdev_error(netdev,
 397                                  "Received newlink with wrong KIND %s, "
 398                                  "expected %s", received_kind, kind);
 399                 netdev_enter_failed(netdev);
 400                 return r;
 401         }
 402
 403         netdev->ifindex = ifindex;
 404
 405         log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
 406
 407         netdev_enter_ready(netdev);
 408
 409         return 0;
 410 }
 411
 412 #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
 413
 414 int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
 415         _cleanup_free_ struct ether_addr *mac = NULL;
 416         uint64_t result;
 417         size_t l, sz;
 418         uint8_t *v;
 419         int r;
 420
 421         assert(ifname);
 422         assert(ret);
 423
 424         mac = new0(struct ether_addr, 1);
 425         if (!mac)
 426                 return -ENOMEM;
 427
 428         l = strlen(ifname);
 429         sz = sizeof(sd_id128_t) + l;
 430         v = alloca(sz);
 431
 432         /* fetch some persistent data unique to the machine */
 433         r = sd_id128_get_machine((sd_id128_t*) v);
 434         if (r < 0)
 435                 return r;
 436
 437         /* combine with some data unique (on this machine) to this
 438          * netdev */
 439         memcpy(v + sizeof(sd_id128_t), ifname, l);
 440
 441         /* Let's hash the host machine ID plus the container name. We
 442          * use a fixed, but originally randomly created hash key here. */
 443         result = siphash24(v, sz, HASH_KEY.bytes);
 444
 445         assert_cc(ETH_ALEN <= sizeof(result));
 446         memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
 447
 448         /* see eth_random_addr in the kernel */
 449         mac->ether_addr_octet[0] &= 0xfe;        /* clear multicast bit */
 450         mac->ether_addr_octet[0] |= 0x02;        /* set local assignment bit (IEEE802) */
 451
 452         *ret = mac;
 453         mac = NULL;
 454
 455         return 0;
 456 }
 457
 458 static int netdev_create(NetDev *netdev, Link *link,
 459                          sd_netlink_message_handler_t callback) {
 460         int r;
 461
 462         assert(netdev);
 463         assert(!link || callback);
 464
 465         /* create netdev */
 466         if (NETDEV_VTABLE(netdev)->create) {
 467                 assert(!link);
 468
 469                 r = NETDEV_VTABLE(netdev)->create(netdev);
 470                 if (r < 0)
 471                         return r;
 472
 473                 log_netdev_debug(netdev, "Created");
 474         } else {
 475                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 476
 477                 r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
 478                 if (r < 0)
 479                         return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
 480
 481                 r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
 482                 if (r < 0)
 483                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
 484
 485                 if (netdev->mac) {
 486                         r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
 487                         if (r < 0)
 488                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
 489                 }
 490
 491                 if (netdev->mtu) {
 492                         r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
 493                         if (r < 0)
 494                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
 495                 }
 496
 497                 if (link) {
 498                         r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
 499                         if (r < 0)
 500                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m");
 501                 }
 502
 503                 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
 504                 if (r < 0)
 505                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 506
 507                 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
 508                 if (r < 0)
 509                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 510
 511                 if (NETDEV_VTABLE(netdev)->fill_message_create) {
 512                         r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
 513                         if (r < 0)
 514                                 return r;
 515                 }
 516
 517                 r = sd_netlink_message_close_container(m);
 518                 if (r < 0)
 519                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 520
 521                 r = sd_netlink_message_close_container(m);
 522                 if (r < 0)
 523                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 524
 525                 if (link) {
 526                         r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
 527                         if (r < 0)
 528                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 529
 530                         link_ref(link);
 531                 } else {
 532                         r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
 533                         if (r < 0)
 534                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 535
 536                         netdev_ref(netdev);
 537                 }
 538
 539                 netdev->state = NETDEV_STATE_CREATING;
 540
 541                 log_netdev_debug(netdev, "Creating");
 542         }
 543
 544         return 0;
 545 }
 546
 547 /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
 548 int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 549         int r;
 550
 551         assert(netdev);
 552         assert(netdev->manager);
 553         assert(netdev->manager->rtnl);
 554         assert(NETDEV_VTABLE(netdev));
 555
 556         switch (NETDEV_VTABLE(netdev)->create_type) {
 557         case NETDEV_CREATE_MASTER:
 558                 r = netdev_enslave(netdev, link, callback);
 559                 if (r < 0)
 560                         return r;
 561
 562                 break;
 563         case NETDEV_CREATE_STACKED:
 564                 r = netdev_create(netdev, link, callback);
 565                 if (r < 0)
 566                         return r;
 567
 568                 break;
 569         default:
 570                 assert_not_reached("Can not join independent netdev");
 571         }
 572
 573         return 0;
 574 }
 575
 576 static int netdev_load_one(Manager *manager, const char *filename) {
 577         _cleanup_netdev_unref_ NetDev *netdev = NULL;
 578         _cleanup_free_ NetDev *netdev_raw = NULL;
 579         _cleanup_fclose_ FILE *file = NULL;
 580         int r;
 581
 582         assert(manager);
 583         assert(filename);
 584
 585         file = fopen(filename, "re");
 586         if (!file) {
 587                 if (errno == ENOENT)
 588                         return 0;
 589                 else
 590                         return -errno;
 591         }
 592
 593         if (null_or_empty_fd(fileno(file))) {
 594                 log_debug("Skipping empty file: %s", filename);
 595                 return 0;
 596         }
 597
 598         netdev_raw = new0(NetDev, 1);
 599         if (!netdev_raw)
 600                 return log_oom();
 601
 602         netdev_raw->kind = _NETDEV_KIND_INVALID;
 603
 604         r = config_parse(NULL, filename, file,
 605                          "Match\0NetDev\0",
 606                          config_item_perf_lookup, network_netdev_gperf_lookup,
 607                          true, false, true, netdev_raw);
 608         if (r < 0)
 609                 return r;
 610
 611         r = fseek(file, 0, SEEK_SET);
 612         if (r < 0)
 613                 return -errno;
 614
 615         /* skip out early if configuration does not match the environment */
 616         if (net_match_config(NULL, NULL, NULL, NULL, NULL,
 617                              netdev_raw->match_host, netdev_raw->match_virt,
 618                              netdev_raw->match_kernel, netdev_raw->match_arch,
 619                              NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
 620                 return 0;
 621
 622         if (netdev_raw->kind == _NETDEV_KIND_INVALID) {
 623                 log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename);
 624                 return 0;
 625         }
 626
 627         if (!netdev_raw->ifname) {
 628                 log_warning("NetDev without Name configured in %s. Ignoring", filename);
 629                 return 0;
 630         }
 631
 632         netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
 633         if (!netdev)
 634                 return log_oom();
 635
 636         netdev->n_ref = 1;
 637         netdev->manager = manager;
 638         netdev->state = _NETDEV_STATE_INVALID;
 639         netdev->kind = netdev_raw->kind;
 640         netdev->ifname = netdev_raw->ifname;
 641
 642         if (NETDEV_VTABLE(netdev)->init)
 643                 NETDEV_VTABLE(netdev)->init(netdev);
 644
 645         r = config_parse(NULL, filename, file,
 646                          NETDEV_VTABLE(netdev)->sections,
 647                          config_item_perf_lookup, network_netdev_gperf_lookup,
 648                          false, false, false, netdev);
 649         if (r < 0)
 650                 return r;
 651
 652         /* verify configuration */
 653         if (NETDEV_VTABLE(netdev)->config_verify) {
 654                 r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
 655                 if (r < 0)
 656                         return 0;
 657         }
 658
 659         netdev->filename = strdup(filename);
 660         if (!netdev->filename)
 661                 return log_oom();
 662
 663         if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) {
 664                 r = netdev_get_mac(netdev->ifname, &netdev->mac);
 665                 if (r < 0)
 666                         return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname);
 667         }
 668
 669         r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
 670         if (r < 0)
 671                 return r;
 672
 673         LIST_HEAD_INIT(netdev->callbacks);
 674
 675         log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
 676
 677         switch (NETDEV_VTABLE(netdev)->create_type) {
 678         case NETDEV_CREATE_MASTER:
 679         case NETDEV_CREATE_INDEPENDENT:
 680                 r = netdev_create(netdev, NULL, NULL);
 681                 if (r < 0)
 682                         return 0;
 683
 684                 break;
 685         default:
 686                 break;
 687         }
 688
 689         netdev = NULL;
 690
 691         return 0;
 692 }
 693
 694 int netdev_load(Manager *manager) {
 695         _cleanup_strv_free_ char **files = NULL;
 696         NetDev *netdev;
 697         char **f;
 698         int r;
 699
 700         assert(manager);
 701
 702         while ((netdev = hashmap_first(manager->netdevs)))
 703                 netdev_unref(netdev);
 704
 705         r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs);
 706         if (r < 0)
 707                 return log_error_errno(r, "Failed to enumerate netdev files: %m");
 708
 709         STRV_FOREACH_BACKWARDS(f, files) {
 710                 r = netdev_load_one(manager, *f);
 711                 if (r < 0)
 712                         return r;
 713         }
 714
 715         return 0;
 716 }