src/network/netdev/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 "netdev/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         [NETDEV_KIND_BRIDGE] = &bridge_vtable,
  38         [NETDEV_KIND_BOND] = &bond_vtable,
  39         [NETDEV_KIND_VLAN] = &vlan_vtable,
  40         [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
  41         [NETDEV_KIND_MACVTAP] = &macvtap_vtable,
  42         [NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
  43         [NETDEV_KIND_VXLAN] = &vxlan_vtable,
  44         [NETDEV_KIND_IPIP] = &ipip_vtable,
  45         [NETDEV_KIND_GRE] = &gre_vtable,
  46         [NETDEV_KIND_GRETAP] = &gretap_vtable,
  47         [NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
  48         [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
  49         [NETDEV_KIND_SIT] = &sit_vtable,
  50         [NETDEV_KIND_VTI] = &vti_vtable,
  51         [NETDEV_KIND_VTI6] = &vti6_vtable,
  52         [NETDEV_KIND_VETH] = &veth_vtable,
  53         [NETDEV_KIND_DUMMY] = &dummy_vtable,
  54         [NETDEV_KIND_TUN] = &tun_vtable,
  55         [NETDEV_KIND_TAP] = &tap_vtable,
  56         [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
  57         [NETDEV_KIND_VRF] = &vrf_vtable,
  58         [NETDEV_KIND_VCAN] = &vcan_vtable,
  59 };
  60
  61 static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
  62         [NETDEV_KIND_BRIDGE] = "bridge",
  63         [NETDEV_KIND_BOND] = "bond",
  64         [NETDEV_KIND_VLAN] = "vlan",
  65         [NETDEV_KIND_MACVLAN] = "macvlan",
  66         [NETDEV_KIND_MACVTAP] = "macvtap",
  67         [NETDEV_KIND_IPVLAN] = "ipvlan",
  68         [NETDEV_KIND_VXLAN] = "vxlan",
  69         [NETDEV_KIND_IPIP] = "ipip",
  70         [NETDEV_KIND_GRE] = "gre",
  71         [NETDEV_KIND_GRETAP] = "gretap",
  72         [NETDEV_KIND_IP6GRE] = "ip6gre",
  73         [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
  74         [NETDEV_KIND_SIT] = "sit",
  75         [NETDEV_KIND_VETH] = "veth",
  76         [NETDEV_KIND_VTI] = "vti",
  77         [NETDEV_KIND_VTI6] = "vti6",
  78         [NETDEV_KIND_DUMMY] = "dummy",
  79         [NETDEV_KIND_TUN] = "tun",
  80         [NETDEV_KIND_TAP] = "tap",
  81         [NETDEV_KIND_IP6TNL] = "ip6tnl",
  82         [NETDEV_KIND_VRF] = "vrf",
  83         [NETDEV_KIND_VCAN] = "vcan",
  84 };
  85
  86 DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
  87 DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
  88
  89 static void netdev_cancel_callbacks(NetDev *netdev) {
  90         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
  91         netdev_join_callback *callback;
  92
  93         if (!netdev)
  94                 return;
  95
  96         rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
  97
  98         while ((callback = netdev->callbacks)) {
  99                 if (m) {
 100                         assert(callback->link);
 101                         assert(callback->callback);
 102                         assert(netdev->manager);
 103                         assert(netdev->manager->rtnl);
 104
 105                         callback->callback(netdev->manager->rtnl, m, callback->link);
 106                 }
 107
 108                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 109                 link_unref(callback->link);
 110                 free(callback);
 111         }
 112 }
 113
 114 static void netdev_free(NetDev *netdev) {
 115         if (!netdev)
 116                 return;
 117
 118         netdev_cancel_callbacks(netdev);
 119
 120         if (netdev->ifname)
 121                 hashmap_remove(netdev->manager->netdevs, netdev->ifname);
 122
 123         free(netdev->filename);
 124
 125         free(netdev->description);
 126         free(netdev->ifname);
 127         free(netdev->mac);
 128
 129         condition_free_list(netdev->match_host);
 130         condition_free_list(netdev->match_virt);
 131         condition_free_list(netdev->match_kernel);
 132         condition_free_list(netdev->match_arch);
 133
 134         if (NETDEV_VTABLE(netdev) &&
 135             NETDEV_VTABLE(netdev)->done)
 136                 NETDEV_VTABLE(netdev)->done(netdev);
 137
 138         free(netdev);
 139 }
 140
 141 NetDev *netdev_unref(NetDev *netdev) {
 142         if (netdev && (-- netdev->n_ref <= 0))
 143                 netdev_free(netdev);
 144
 145         return NULL;
 146 }
 147
 148 NetDev *netdev_ref(NetDev *netdev) {
 149         if (netdev)
 150                 assert_se(++ netdev->n_ref >= 2);
 151
 152         return netdev;
 153 }
 154
 155 void netdev_drop(NetDev *netdev) {
 156         if (!netdev || netdev->state == NETDEV_STATE_LINGER)
 157                 return;
 158
 159         netdev->state = NETDEV_STATE_LINGER;
 160
 161         log_netdev_debug(netdev, "netdev removed");
 162
 163         netdev_cancel_callbacks(netdev);
 164
 165         netdev_unref(netdev);
 166
 167         return;
 168 }
 169
 170 int netdev_get(Manager *manager, const char *name, NetDev **ret) {
 171         NetDev *netdev;
 172
 173         assert(manager);
 174         assert(name);
 175         assert(ret);
 176
 177         netdev = hashmap_get(manager->netdevs, name);
 178         if (!netdev) {
 179                 *ret = NULL;
 180                 return -ENOENT;
 181         }
 182
 183         *ret = netdev;
 184
 185         return 0;
 186 }
 187
 188 static int netdev_enter_failed(NetDev *netdev) {
 189         netdev->state = NETDEV_STATE_FAILED;
 190
 191         netdev_cancel_callbacks(netdev);
 192
 193         return 0;
 194 }
 195
 196 static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) {
 197         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 198         int r;
 199
 200         assert(netdev);
 201         assert(netdev->state == NETDEV_STATE_READY);
 202         assert(netdev->manager);
 203         assert(netdev->manager->rtnl);
 204         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 205         assert(link);
 206         assert(callback);
 207
 208         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
 209         if (r < 0)
 210                 return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
 211
 212         r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
 213         if (r < 0)
 214                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
 215
 216         r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
 217         if (r < 0)
 218                 return log_netdev_error(netdev, "Could not send rtnetlink message: %m");
 219
 220         link_ref(link);
 221
 222         log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname);
 223
 224         return 0;
 225 }
 226
 227 static int netdev_enter_ready(NetDev *netdev) {
 228         netdev_join_callback *callback, *callback_next;
 229         int r;
 230
 231         assert(netdev);
 232         assert(netdev->ifname);
 233
 234         if (netdev->state != NETDEV_STATE_CREATING)
 235                 return 0;
 236
 237         netdev->state = NETDEV_STATE_READY;
 238
 239         log_netdev_info(netdev, "netdev ready");
 240
 241         LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
 242                 /* enslave the links that were attempted to be enslaved before the
 243                  * link was ready */
 244                 r = netdev_enslave_ready(netdev, callback->link, callback->callback);
 245                 if (r < 0)
 246                         return r;
 247
 248                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 249                 link_unref(callback->link);
 250                 free(callback);
 251         }
 252
 253         if (NETDEV_VTABLE(netdev)->post_create)
 254                 NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL);
 255
 256         return 0;
 257 }
 258
 259 /* callback for netdev's created without a backing Link */
 260 static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 261         _cleanup_netdev_unref_ NetDev *netdev = userdata;
 262         int r;
 263
 264         assert(netdev->state != _NETDEV_STATE_INVALID);
 265
 266         r = sd_netlink_message_get_errno(m);
 267         if (r == -EEXIST)
 268                 log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
 269         else if (r < 0) {
 270                 log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
 271                 netdev_drop(netdev);
 272
 273                 return 1;
 274         }
 275
 276         log_netdev_debug(netdev, "Created");
 277
 278         return 1;
 279 }
 280
 281 int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 282         int r;
 283
 284         assert(netdev);
 285         assert(netdev->manager);
 286         assert(netdev->manager->rtnl);
 287         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 288
 289         if (netdev->state == NETDEV_STATE_READY) {
 290                 r = netdev_enslave_ready(netdev, link, callback);
 291                 if (r < 0)
 292                         return r;
 293         } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) {
 294                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 295
 296                 r = rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
 297                 if (r >= 0)
 298                         callback(netdev->manager->rtnl, m, link);
 299         } else {
 300                 /* the netdev is not yet read, save this request for when it is */
 301                 netdev_join_callback *cb;
 302
 303                 cb = new0(netdev_join_callback, 1);
 304                 if (!cb)
 305                         return log_oom();
 306
 307                 cb->callback = callback;
 308                 cb->link = link;
 309                 link_ref(link);
 310
 311                 LIST_PREPEND(callbacks, netdev->callbacks, cb);
 312
 313                 log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname);
 314         }
 315
 316         return 0;
 317 }
 318
 319 int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
 320         uint16_t type;
 321         const char *kind;
 322         const char *received_kind;
 323         const char *received_name;
 324         int r, ifindex;
 325
 326         assert(netdev);
 327         assert(message);
 328
 329         r = sd_netlink_message_get_type(message, &type);
 330         if (r < 0)
 331                 return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
 332
 333         if (type != RTM_NEWLINK) {
 334                 log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type.");
 335                 return -EINVAL;
 336         }
 337
 338         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 339         if (r < 0) {
 340                 log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
 341                 netdev_enter_failed(netdev);
 342                 return r;
 343         } else if (ifindex <= 0) {
 344                 log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
 345                 netdev_enter_failed(netdev);
 346                 return -EINVAL;
 347         }
 348
 349         if (netdev->ifindex > 0) {
 350                 if (netdev->ifindex != ifindex) {
 351                         log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
 352                                          ifindex, netdev->ifindex);
 353                         netdev_enter_failed(netdev);
 354                         return -EEXIST;
 355                 } else
 356                         /* ifindex already set to the same for this netdev */
 357                         return 0;
 358         }
 359
 360         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
 361         if (r < 0)
 362                 return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
 363
 364         if (!streq(netdev->ifname, received_name)) {
 365                 log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
 366                 netdev_enter_failed(netdev);
 367                 return r;
 368         }
 369
 370         r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
 371         if (r < 0)
 372                 return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
 373
 374         r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
 375         if (r < 0)
 376                 return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
 377
 378         r = sd_netlink_message_exit_container(message);
 379         if (r < 0)
 380                 return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
 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         uint64_t result;
 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         result = siphash24(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_netlink_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_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 475
 476                 r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
 477                 if (r < 0)
 478                         return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
 479
 480                 r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
 481                 if (r < 0)
 482                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
 483
 484                 if (netdev->mac) {
 485                         r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
 486                         if (r < 0)
 487                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
 488                 }
 489
 490                 if (netdev->mtu) {
 491                         r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
 492                         if (r < 0)
 493                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
 494                 }
 495
 496                 if (link) {
 497                         r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
 498                         if (r < 0)
 499                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m");
 500                 }
 501
 502                 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
 503                 if (r < 0)
 504                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 505
 506                 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
 507                 if (r < 0)
 508                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 509
 510                 if (NETDEV_VTABLE(netdev)->fill_message_create) {
 511                         r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
 512                         if (r < 0)
 513                                 return r;
 514                 }
 515
 516                 r = sd_netlink_message_close_container(m);
 517                 if (r < 0)
 518                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 519
 520                 r = sd_netlink_message_close_container(m);
 521                 if (r < 0)
 522                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 523
 524                 if (link) {
 525                         r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
 526                         if (r < 0)
 527                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 528
 529                         link_ref(link);
 530                 } else {
 531                         r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
 532                         if (r < 0)
 533                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 534
 535                         netdev_ref(netdev);
 536                 }
 537
 538                 netdev->state = NETDEV_STATE_CREATING;
 539
 540                 log_netdev_debug(netdev, "Creating");
 541         }
 542
 543         return 0;
 544 }
 545
 546 /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
 547 int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 548         int r;
 549
 550         assert(netdev);
 551         assert(netdev->manager);
 552         assert(netdev->manager->rtnl);
 553         assert(NETDEV_VTABLE(netdev));
 554
 555         switch (NETDEV_VTABLE(netdev)->create_type) {
 556         case NETDEV_CREATE_MASTER:
 557                 r = netdev_enslave(netdev, link, callback);
 558                 if (r < 0)
 559                         return r;
 560
 561                 break;
 562         case NETDEV_CREATE_STACKED:
 563                 r = netdev_create(netdev, link, callback);
 564                 if (r < 0)
 565                         return r;
 566
 567                 break;
 568         default:
 569                 assert_not_reached("Can not join independent netdev");
 570         }
 571
 572         return 0;
 573 }
 574
 575 static int netdev_load_one(Manager *manager, const char *filename) {
 576         _cleanup_netdev_unref_ NetDev *netdev = NULL;
 577         _cleanup_free_ NetDev *netdev_raw = NULL;
 578         _cleanup_fclose_ FILE *file = NULL;
 579         const char *dropin_dirname;
 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         dropin_dirname = strjoina(basename(filename), ".d");
 604
 605         r = config_parse_many(filename, network_dirs, dropin_dirname,
 606                               "Match\0NetDev\0",
 607                               config_item_perf_lookup, network_netdev_gperf_lookup,
 608                               true, netdev_raw);
 609         if (r < 0)
 610                 return r;
 611
 612         r = fseek(file, 0, SEEK_SET);
 613         if (r < 0)
 614                 return -errno;
 615
 616         /* skip out early if configuration does not match the environment */
 617         if (net_match_config(NULL, NULL, NULL, NULL, NULL,
 618                              netdev_raw->match_host, netdev_raw->match_virt,
 619                              netdev_raw->match_kernel, netdev_raw->match_arch,
 620                              NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
 621                 return 0;
 622
 623         if (netdev_raw->kind == _NETDEV_KIND_INVALID) {
 624                 log_warning("NetDev has no Kind configured in %s. Ignoring", filename);
 625                 return 0;
 626         }
 627
 628         if (!netdev_raw->ifname) {
 629                 log_warning("NetDev without Name configured in %s. Ignoring", filename);
 630                 return 0;
 631         }
 632
 633         netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
 634         if (!netdev)
 635                 return log_oom();
 636
 637         netdev->n_ref = 1;
 638         netdev->manager = manager;
 639         netdev->state = _NETDEV_STATE_INVALID;
 640         netdev->kind = netdev_raw->kind;
 641         netdev->ifname = netdev_raw->ifname;
 642
 643         if (NETDEV_VTABLE(netdev)->init)
 644                 NETDEV_VTABLE(netdev)->init(netdev);
 645
 646         r = config_parse(NULL, filename, file,
 647                          NETDEV_VTABLE(netdev)->sections,
 648                          config_item_perf_lookup, network_netdev_gperf_lookup,
 649                          false, false, false, netdev);
 650         if (r < 0)
 651                 return r;
 652
 653         /* verify configuration */
 654         if (NETDEV_VTABLE(netdev)->config_verify) {
 655                 r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
 656                 if (r < 0)
 657                         return 0;
 658         }
 659
 660         netdev->filename = strdup(filename);
 661         if (!netdev->filename)
 662                 return log_oom();
 663
 664         if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) {
 665                 r = netdev_get_mac(netdev->ifname, &netdev->mac);
 666                 if (r < 0)
 667                         return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname);
 668         }
 669
 670         r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
 671         if (r < 0)
 672                 return r;
 673
 674         LIST_HEAD_INIT(netdev->callbacks);
 675
 676         log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
 677
 678         switch (NETDEV_VTABLE(netdev)->create_type) {
 679         case NETDEV_CREATE_MASTER:
 680         case NETDEV_CREATE_INDEPENDENT:
 681                 r = netdev_create(netdev, NULL, NULL);
 682                 if (r < 0)
 683                         return 0;
 684
 685                 break;
 686         default:
 687                 break;
 688         }
 689
 690         netdev = NULL;
 691
 692         return 0;
 693 }
 694
 695 int netdev_load(Manager *manager) {
 696         _cleanup_strv_free_ char **files = NULL;
 697         NetDev *netdev;
 698         char **f;
 699         int r;
 700
 701         assert(manager);
 702
 703         while ((netdev = hashmap_first(manager->netdevs)))
 704                 netdev_unref(netdev);
 705
 706         r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs);
 707         if (r < 0)
 708                 return log_error_errno(r, "Failed to enumerate netdev files: %m");
 709
 710         STRV_FOREACH_BACKWARDS(f, files) {
 711                 r = netdev_load_one(manager, *f);
 712                 if (r < 0)
 713                         return r;
 714         }
 715
 716         return 0;
 717 }