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-manager.h"
  31 #include "siphash24.h"
  32 #include "stat-util.h"
  33 #include "string-table.h"
  34 #include "string-util.h"
  35
  36 #include "netdev/bridge.h"
  37 #include "netdev/bond.h"
  38 #include "netdev/geneve.h"
  39 #include "netdev/vlan.h"
  40 #include "netdev/macvlan.h"
  41 #include "netdev/ipvlan.h"
  42 #include "netdev/vxlan.h"
  43 #include "netdev/tunnel.h"
  44 #include "netdev/tuntap.h"
  45 #include "netdev/veth.h"
  46 #include "netdev/dummy.h"
  47 #include "netdev/vrf.h"
  48 #include "netdev/vcan.h"
  49
  50 const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
  51         [NETDEV_KIND_BRIDGE] = &bridge_vtable,
  52         [NETDEV_KIND_BOND] = &bond_vtable,
  53         [NETDEV_KIND_VLAN] = &vlan_vtable,
  54         [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
  55         [NETDEV_KIND_MACVTAP] = &macvtap_vtable,
  56         [NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
  57         [NETDEV_KIND_VXLAN] = &vxlan_vtable,
  58         [NETDEV_KIND_IPIP] = &ipip_vtable,
  59         [NETDEV_KIND_GRE] = &gre_vtable,
  60         [NETDEV_KIND_GRETAP] = &gretap_vtable,
  61         [NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
  62         [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
  63         [NETDEV_KIND_SIT] = &sit_vtable,
  64         [NETDEV_KIND_VTI] = &vti_vtable,
  65         [NETDEV_KIND_VTI6] = &vti6_vtable,
  66         [NETDEV_KIND_VETH] = &veth_vtable,
  67         [NETDEV_KIND_DUMMY] = &dummy_vtable,
  68         [NETDEV_KIND_TUN] = &tun_vtable,
  69         [NETDEV_KIND_TAP] = &tap_vtable,
  70         [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
  71         [NETDEV_KIND_VRF] = &vrf_vtable,
  72         [NETDEV_KIND_VCAN] = &vcan_vtable,
  73         [NETDEV_KIND_GENEVE] = &geneve_vtable,
  74 };
  75
  76 static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
  77         [NETDEV_KIND_BRIDGE] = "bridge",
  78         [NETDEV_KIND_BOND] = "bond",
  79         [NETDEV_KIND_VLAN] = "vlan",
  80         [NETDEV_KIND_MACVLAN] = "macvlan",
  81         [NETDEV_KIND_MACVTAP] = "macvtap",
  82         [NETDEV_KIND_IPVLAN] = "ipvlan",
  83         [NETDEV_KIND_VXLAN] = "vxlan",
  84         [NETDEV_KIND_IPIP] = "ipip",
  85         [NETDEV_KIND_GRE] = "gre",
  86         [NETDEV_KIND_GRETAP] = "gretap",
  87         [NETDEV_KIND_IP6GRE] = "ip6gre",
  88         [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
  89         [NETDEV_KIND_SIT] = "sit",
  90         [NETDEV_KIND_VETH] = "veth",
  91         [NETDEV_KIND_VTI] = "vti",
  92         [NETDEV_KIND_VTI6] = "vti6",
  93         [NETDEV_KIND_DUMMY] = "dummy",
  94         [NETDEV_KIND_TUN] = "tun",
  95         [NETDEV_KIND_TAP] = "tap",
  96         [NETDEV_KIND_IP6TNL] = "ip6tnl",
  97         [NETDEV_KIND_VRF] = "vrf",
  98         [NETDEV_KIND_VCAN] = "vcan",
  99         [NETDEV_KIND_GENEVE] = "geneve",
 100 };
 101
 102 DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
 103 DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
 104
 105 static void netdev_cancel_callbacks(NetDev *netdev) {
 106         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 107         netdev_join_callback *callback;
 108
 109         if (!netdev)
 110                 return;
 111
 112         rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
 113
 114         while ((callback = netdev->callbacks)) {
 115                 if (m) {
 116                         assert(callback->link);
 117                         assert(callback->callback);
 118                         assert(netdev->manager);
 119                         assert(netdev->manager->rtnl);
 120
 121                         callback->callback(netdev->manager->rtnl, m, callback->link);
 122                 }
 123
 124                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 125                 link_unref(callback->link);
 126                 free(callback);
 127         }
 128 }
 129
 130 static void netdev_free(NetDev *netdev) {
 131         if (!netdev)
 132                 return;
 133
 134         netdev_cancel_callbacks(netdev);
 135
 136         if (netdev->ifname)
 137                 hashmap_remove(netdev->manager->netdevs, netdev->ifname);
 138
 139         free(netdev->filename);
 140
 141         free(netdev->description);
 142         free(netdev->ifname);
 143         free(netdev->mac);
 144
 145         condition_free_list(netdev->match_host);
 146         condition_free_list(netdev->match_virt);
 147         condition_free_list(netdev->match_kernel);
 148         condition_free_list(netdev->match_arch);
 149
 150         if (NETDEV_VTABLE(netdev) &&
 151             NETDEV_VTABLE(netdev)->done)
 152                 NETDEV_VTABLE(netdev)->done(netdev);
 153
 154         free(netdev);
 155 }
 156
 157 NetDev *netdev_unref(NetDev *netdev) {
 158         if (netdev && (-- netdev->n_ref <= 0))
 159                 netdev_free(netdev);
 160
 161         return NULL;
 162 }
 163
 164 NetDev *netdev_ref(NetDev *netdev) {
 165         if (netdev)
 166                 assert_se(++ netdev->n_ref >= 2);
 167
 168         return netdev;
 169 }
 170
 171 void netdev_drop(NetDev *netdev) {
 172         if (!netdev || netdev->state == NETDEV_STATE_LINGER)
 173                 return;
 174
 175         netdev->state = NETDEV_STATE_LINGER;
 176
 177         log_netdev_debug(netdev, "netdev removed");
 178
 179         netdev_cancel_callbacks(netdev);
 180
 181         netdev_unref(netdev);
 182
 183         return;
 184 }
 185
 186 int netdev_get(Manager *manager, const char *name, NetDev **ret) {
 187         NetDev *netdev;
 188
 189         assert(manager);
 190         assert(name);
 191         assert(ret);
 192
 193         netdev = hashmap_get(manager->netdevs, name);
 194         if (!netdev) {
 195                 *ret = NULL;
 196                 return -ENOENT;
 197         }
 198
 199         *ret = netdev;
 200
 201         return 0;
 202 }
 203
 204 static int netdev_enter_failed(NetDev *netdev) {
 205         netdev->state = NETDEV_STATE_FAILED;
 206
 207         netdev_cancel_callbacks(netdev);
 208
 209         return 0;
 210 }
 211
 212 static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) {
 213         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 214         int r;
 215
 216         assert(netdev);
 217         assert(netdev->state == NETDEV_STATE_READY);
 218         assert(netdev->manager);
 219         assert(netdev->manager->rtnl);
 220         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 221         assert(link);
 222         assert(callback);
 223
 224         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
 225         if (r < 0)
 226                 return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
 227
 228         r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
 229         if (r < 0)
 230                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
 231
 232         r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
 233         if (r < 0)
 234                 return log_netdev_error(netdev, "Could not send rtnetlink message: %m");
 235
 236         link_ref(link);
 237
 238         log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname);
 239
 240         return 0;
 241 }
 242
 243 static int netdev_enter_ready(NetDev *netdev) {
 244         netdev_join_callback *callback, *callback_next;
 245         int r;
 246
 247         assert(netdev);
 248         assert(netdev->ifname);
 249
 250         if (netdev->state != NETDEV_STATE_CREATING)
 251                 return 0;
 252
 253         netdev->state = NETDEV_STATE_READY;
 254
 255         log_netdev_info(netdev, "netdev ready");
 256
 257         LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
 258                 /* enslave the links that were attempted to be enslaved before the
 259                  * link was ready */
 260                 r = netdev_enslave_ready(netdev, callback->link, callback->callback);
 261                 if (r < 0)
 262                         return r;
 263
 264                 LIST_REMOVE(callbacks, netdev->callbacks, callback);
 265                 link_unref(callback->link);
 266                 free(callback);
 267         }
 268
 269         if (NETDEV_VTABLE(netdev)->post_create)
 270                 NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL);
 271
 272         return 0;
 273 }
 274
 275 /* callback for netdev's created without a backing Link */
 276 static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
 277         _cleanup_netdev_unref_ NetDev *netdev = userdata;
 278         int r;
 279
 280         assert(netdev->state != _NETDEV_STATE_INVALID);
 281
 282         r = sd_netlink_message_get_errno(m);
 283         if (r == -EEXIST)
 284                 log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
 285         else if (r < 0) {
 286                 log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
 287                 netdev_drop(netdev);
 288
 289                 return 1;
 290         }
 291
 292         log_netdev_debug(netdev, "Created");
 293
 294         return 1;
 295 }
 296
 297 int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 298         int r;
 299
 300         assert(netdev);
 301         assert(netdev->manager);
 302         assert(netdev->manager->rtnl);
 303         assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
 304
 305         if (netdev->state == NETDEV_STATE_READY) {
 306                 r = netdev_enslave_ready(netdev, link, callback);
 307                 if (r < 0)
 308                         return r;
 309         } else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) {
 310                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 311
 312                 r = rtnl_message_new_synthetic_error(-ENODEV, 0, &m);
 313                 if (r >= 0)
 314                         callback(netdev->manager->rtnl, m, link);
 315         } else {
 316                 /* the netdev is not yet read, save this request for when it is */
 317                 netdev_join_callback *cb;
 318
 319                 cb = new0(netdev_join_callback, 1);
 320                 if (!cb)
 321                         return log_oom();
 322
 323                 cb->callback = callback;
 324                 cb->link = link;
 325                 link_ref(link);
 326
 327                 LIST_PREPEND(callbacks, netdev->callbacks, cb);
 328
 329                 log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname);
 330         }
 331
 332         return 0;
 333 }
 334
 335 int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
 336         uint16_t type;
 337         const char *kind;
 338         const char *received_kind;
 339         const char *received_name;
 340         int r, ifindex;
 341
 342         assert(netdev);
 343         assert(message);
 344
 345         r = sd_netlink_message_get_type(message, &type);
 346         if (r < 0)
 347                 return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
 348
 349         if (type != RTM_NEWLINK) {
 350                 log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type.");
 351                 return -EINVAL;
 352         }
 353
 354         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
 355         if (r < 0) {
 356                 log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
 357                 netdev_enter_failed(netdev);
 358                 return r;
 359         } else if (ifindex <= 0) {
 360                 log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
 361                 netdev_enter_failed(netdev);
 362                 return -EINVAL;
 363         }
 364
 365         if (netdev->ifindex > 0) {
 366                 if (netdev->ifindex != ifindex) {
 367                         log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
 368                                          ifindex, netdev->ifindex);
 369                         netdev_enter_failed(netdev);
 370                         return -EEXIST;
 371                 } else
 372                         /* ifindex already set to the same for this netdev */
 373                         return 0;
 374         }
 375
 376         r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
 377         if (r < 0)
 378                 return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
 379
 380         if (!streq(netdev->ifname, received_name)) {
 381                 log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
 382                 netdev_enter_failed(netdev);
 383                 return r;
 384         }
 385
 386         r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
 387         if (r < 0)
 388                 return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
 389
 390         r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
 391         if (r < 0)
 392                 return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
 393
 394         r = sd_netlink_message_exit_container(message);
 395         if (r < 0)
 396                 return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
 397
 398         if (netdev->kind == NETDEV_KIND_TAP)
 399                 /* the kernel does not distinguish between tun and tap */
 400                 kind = "tun";
 401         else {
 402                 kind = netdev_kind_to_string(netdev->kind);
 403                 if (!kind) {
 404                         log_netdev_error(netdev, "Could not get kind");
 405                         netdev_enter_failed(netdev);
 406                         return -EINVAL;
 407                 }
 408         }
 409
 410         if (!streq(kind, received_kind)) {
 411                 log_netdev_error(netdev,
 412                                  "Received newlink with wrong KIND %s, "
 413                                  "expected %s", received_kind, kind);
 414                 netdev_enter_failed(netdev);
 415                 return r;
 416         }
 417
 418         netdev->ifindex = ifindex;
 419
 420         log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
 421
 422         netdev_enter_ready(netdev);
 423
 424         return 0;
 425 }
 426
 427 #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
 428
 429 int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
 430         _cleanup_free_ struct ether_addr *mac = NULL;
 431         uint64_t result;
 432         size_t l, sz;
 433         uint8_t *v;
 434         int r;
 435
 436         assert(ifname);
 437         assert(ret);
 438
 439         mac = new0(struct ether_addr, 1);
 440         if (!mac)
 441                 return -ENOMEM;
 442
 443         l = strlen(ifname);
 444         sz = sizeof(sd_id128_t) + l;
 445         v = alloca(sz);
 446
 447         /* fetch some persistent data unique to the machine */
 448         r = sd_id128_get_machine((sd_id128_t*) v);
 449         if (r < 0)
 450                 return r;
 451
 452         /* combine with some data unique (on this machine) to this
 453          * netdev */
 454         memcpy(v + sizeof(sd_id128_t), ifname, l);
 455
 456         /* Let's hash the host machine ID plus the container name. We
 457          * use a fixed, but originally randomly created hash key here. */
 458         result = siphash24(v, sz, HASH_KEY.bytes);
 459
 460         assert_cc(ETH_ALEN <= sizeof(result));
 461         memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
 462
 463         /* see eth_random_addr in the kernel */
 464         mac->ether_addr_octet[0] &= 0xfe;        /* clear multicast bit */
 465         mac->ether_addr_octet[0] |= 0x02;        /* set local assignment bit (IEEE802) */
 466
 467         *ret = mac;
 468         mac = NULL;
 469
 470         return 0;
 471 }
 472
 473 static int netdev_create(NetDev *netdev, Link *link,
 474                          sd_netlink_message_handler_t callback) {
 475         int r;
 476
 477         assert(netdev);
 478         assert(!link || callback);
 479
 480         /* create netdev */
 481         if (NETDEV_VTABLE(netdev)->create) {
 482                 assert(!link);
 483
 484                 r = NETDEV_VTABLE(netdev)->create(netdev);
 485                 if (r < 0)
 486                         return r;
 487
 488                 log_netdev_debug(netdev, "Created");
 489         } else {
 490                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
 491
 492                 r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
 493                 if (r < 0)
 494                         return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
 495
 496                 r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
 497                 if (r < 0)
 498                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
 499
 500                 if (netdev->mac) {
 501                         r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
 502                         if (r < 0)
 503                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
 504                 }
 505
 506                 if (netdev->mtu) {
 507                         r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
 508                         if (r < 0)
 509                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
 510                 }
 511
 512                 if (link) {
 513                         r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
 514                         if (r < 0)
 515                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m");
 516                 }
 517
 518                 r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
 519                 if (r < 0)
 520                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 521
 522                 r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
 523                 if (r < 0)
 524                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 525
 526                 if (NETDEV_VTABLE(netdev)->fill_message_create) {
 527                         r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
 528                         if (r < 0)
 529                                 return r;
 530                 }
 531
 532                 r = sd_netlink_message_close_container(m);
 533                 if (r < 0)
 534                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 535
 536                 r = sd_netlink_message_close_container(m);
 537                 if (r < 0)
 538                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 539
 540                 if (link) {
 541                         r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
 542                         if (r < 0)
 543                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 544
 545                         link_ref(link);
 546                 } else {
 547                         r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
 548                         if (r < 0)
 549                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 550
 551                         netdev_ref(netdev);
 552                 }
 553
 554                 netdev->state = NETDEV_STATE_CREATING;
 555
 556                 log_netdev_debug(netdev, "Creating");
 557         }
 558
 559         return 0;
 560 }
 561
 562 /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
 563 int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
 564         int r;
 565
 566         assert(netdev);
 567         assert(netdev->manager);
 568         assert(netdev->manager->rtnl);
 569         assert(NETDEV_VTABLE(netdev));
 570
 571         switch (NETDEV_VTABLE(netdev)->create_type) {
 572         case NETDEV_CREATE_MASTER:
 573                 r = netdev_enslave(netdev, link, callback);
 574                 if (r < 0)
 575                         return r;
 576
 577                 break;
 578         case NETDEV_CREATE_STACKED:
 579                 r = netdev_create(netdev, link, callback);
 580                 if (r < 0)
 581                         return r;
 582
 583                 break;
 584         default:
 585                 assert_not_reached("Can not join independent netdev");
 586         }
 587
 588         return 0;
 589 }
 590
 591 static int netdev_load_one(Manager *manager, const char *filename) {
 592         _cleanup_netdev_unref_ NetDev *netdev = NULL;
 593         _cleanup_free_ NetDev *netdev_raw = NULL;
 594         _cleanup_fclose_ FILE *file = NULL;
 595         const char *dropin_dirname;
 596         int r;
 597
 598         assert(manager);
 599         assert(filename);
 600
 601         file = fopen(filename, "re");
 602         if (!file) {
 603                 if (errno == ENOENT)
 604                         return 0;
 605                 else
 606                         return -errno;
 607         }
 608
 609         if (null_or_empty_fd(fileno(file))) {
 610                 log_debug("Skipping empty file: %s", filename);
 611                 return 0;
 612         }
 613
 614         netdev_raw = new0(NetDev, 1);
 615         if (!netdev_raw)
 616                 return log_oom();
 617
 618         netdev_raw->kind = _NETDEV_KIND_INVALID;
 619         dropin_dirname = strjoina(basename(filename), ".d");
 620
 621         r = config_parse_many(filename, network_dirs, dropin_dirname,
 622                               "Match\0NetDev\0",
 623                               config_item_perf_lookup, network_netdev_gperf_lookup,
 624                               true, netdev_raw);
 625         if (r < 0)
 626                 return r;
 627
 628         r = fseek(file, 0, SEEK_SET);
 629         if (r < 0)
 630                 return -errno;
 631
 632         /* skip out early if configuration does not match the environment */
 633         if (net_match_config(NULL, NULL, NULL, NULL, NULL,
 634                              netdev_raw->match_host, netdev_raw->match_virt,
 635                              netdev_raw->match_kernel, netdev_raw->match_arch,
 636                              NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
 637                 return 0;
 638
 639         if (netdev_raw->kind == _NETDEV_KIND_INVALID) {
 640                 log_warning("NetDev has no Kind configured in %s. Ignoring", filename);
 641                 return 0;
 642         }
 643
 644         if (!netdev_raw->ifname) {
 645                 log_warning("NetDev without Name configured in %s. Ignoring", filename);
 646                 return 0;
 647         }
 648
 649         netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
 650         if (!netdev)
 651                 return log_oom();
 652
 653         netdev->n_ref = 1;
 654         netdev->manager = manager;
 655         netdev->state = _NETDEV_STATE_INVALID;
 656         netdev->kind = netdev_raw->kind;
 657         netdev->ifname = netdev_raw->ifname;
 658
 659         if (NETDEV_VTABLE(netdev)->init)
 660                 NETDEV_VTABLE(netdev)->init(netdev);
 661
 662         r = config_parse(NULL, filename, file,
 663                          NETDEV_VTABLE(netdev)->sections,
 664                          config_item_perf_lookup, network_netdev_gperf_lookup,
 665                          false, false, false, netdev);
 666         if (r < 0)
 667                 return r;
 668
 669         /* verify configuration */
 670         if (NETDEV_VTABLE(netdev)->config_verify) {
 671                 r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
 672                 if (r < 0)
 673                         return 0;
 674         }
 675
 676         netdev->filename = strdup(filename);
 677         if (!netdev->filename)
 678                 return log_oom();
 679
 680         if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) {
 681                 r = netdev_get_mac(netdev->ifname, &netdev->mac);
 682                 if (r < 0)
 683                         return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname);
 684         }
 685
 686         r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
 687         if (r < 0)
 688                 return r;
 689
 690         LIST_HEAD_INIT(netdev->callbacks);
 691
 692         log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
 693
 694         switch (NETDEV_VTABLE(netdev)->create_type) {
 695         case NETDEV_CREATE_MASTER:
 696         case NETDEV_CREATE_INDEPENDENT:
 697                 r = netdev_create(netdev, NULL, NULL);
 698                 if (r < 0)
 699                         return 0;
 700
 701                 break;
 702         default:
 703                 break;
 704         }
 705
 706         netdev = NULL;
 707
 708         return 0;
 709 }
 710
 711 int netdev_load(Manager *manager) {
 712         _cleanup_strv_free_ char **files = NULL;
 713         NetDev *netdev;
 714         char **f;
 715         int r;
 716
 717         assert(manager);
 718
 719         while ((netdev = hashmap_first(manager->netdevs)))
 720                 netdev_unref(netdev);
 721
 722         r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs);
 723         if (r < 0)
 724                 return log_error_errno(r, "Failed to enumerate netdev files: %m");
 725
 726         STRV_FOREACH_BACKWARDS(f, files) {
 727                 r = netdev_load_one(manager, *f);
 728                 if (r < 0)
 729                         return r;
 730         }
 731
 732         return 0;
 733 }