src/network/netdev/vlan.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2013 Tom Gundersen <teg@jklm.no>
   6 ***/
   7
   8 #include <errno.h>
   9 #include <linux/if_vlan.h>
  10 #include <net/if.h>
  11
  12 #include "netdev/vlan.h"
  13 #include "vlan-util.h"
  14
  15 static int netdev_vlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
  16         struct ifla_vlan_flags flags = {};
  17         VLan *v;
  18         int r;
  19
  20         assert(netdev);
  21         assert(link);
  22         assert(req);
  23
  24         v = VLAN(netdev);
  25
  26         assert(v);
  27
  28         r = sd_netlink_message_append_u16(req, IFLA_VLAN_ID, v->id);
  29         if (r < 0)
  30                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VLAN_ID attribute: %m");
  31
  32         if (v->gvrp != -1) {
  33                 flags.mask |= VLAN_FLAG_GVRP;
  34                 SET_FLAG(flags.flags, VLAN_FLAG_GVRP, v->gvrp);
  35         }
  36
  37         if (v->mvrp != -1) {
  38                 flags.mask |= VLAN_FLAG_MVRP;
  39                 SET_FLAG(flags.flags, VLAN_FLAG_MVRP, v->mvrp);
  40         }
  41
  42         if (v->reorder_hdr != -1) {
  43                 flags.mask |= VLAN_FLAG_REORDER_HDR;
  44                 SET_FLAG(flags.flags, VLAN_FLAG_REORDER_HDR, v->reorder_hdr);
  45         }
  46
  47         if (v->loose_binding != -1) {
  48                 flags.mask |= VLAN_FLAG_LOOSE_BINDING;
  49                 SET_FLAG(flags.flags, VLAN_FLAG_LOOSE_BINDING, v->loose_binding);
  50         }
  51
  52         r = sd_netlink_message_append_data(req, IFLA_VLAN_FLAGS, &flags, sizeof(struct ifla_vlan_flags));
  53         if (r < 0)
  54                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_VLAN_FLAGS attribute: %m");
  55
  56         return 0;
  57 }
  58
  59 static int netdev_vlan_verify(NetDev *netdev, const char *filename) {
  60         VLan *v;
  61
  62         assert(netdev);
  63         assert(filename);
  64
  65         v = VLAN(netdev);
  66
  67         assert(v);
  68
  69         if (v->id == VLANID_INVALID) {
  70                 log_warning("VLAN without valid Id (%"PRIu16") configured in %s.", v->id, filename);
  71                 return -EINVAL;
  72         }
  73
  74         return 0;
  75 }
  76
  77 static void vlan_init(NetDev *netdev) {
  78         VLan *v = VLAN(netdev);
  79
  80         assert(netdev);
  81         assert(v);
  82
  83         v->id = VLANID_INVALID;
  84         v->gvrp = -1;
  85         v->mvrp = -1;
  86         v->loose_binding = -1;
  87         v->reorder_hdr = -1;
  88 }
  89
  90 const NetDevVTable vlan_vtable = {
  91         .object_size = sizeof(VLan),
  92         .init = vlan_init,
  93         .sections = "Match\0NetDev\0VLAN\0",
  94         .fill_message_create = netdev_vlan_fill_message_create,
  95         .create_type = NETDEV_CREATE_STACKED,
  96         .config_verify = netdev_vlan_verify,
  97 };