src/network/netdev/macvlan.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4
   5 #include "conf-parser.h"
   6 #include "macvlan.h"
   7 #include "macvlan-util.h"
   8
   9 DEFINE_CONFIG_PARSE_ENUM(config_parse_macvlan_mode, macvlan_mode, MacVlanMode, "Failed to parse macvlan mode");
  10
  11 static int netdev_macvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
  12         MacVlan *m;
  13         int r;
  14
  15         assert(netdev);
  16         assert(link);
  17         assert(netdev->ifname);
  18
  19         if (netdev->kind == NETDEV_KIND_MACVLAN)
  20                 m = MACVLAN(netdev);
  21         else
  22                 m = MACVTAP(netdev);
  23
  24         assert(m);
  25
  26         if (m->mode == NETDEV_MACVLAN_MODE_SOURCE && !set_isempty(m->match_source_mac)) {
  27                 const struct ether_addr *mac_addr;
  28
  29                 r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MACADDR_MODE, MACVLAN_MACADDR_SET);
  30                 if (r < 0)
  31                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MACADDR_MODE attribute: %m");
  32
  33                 r = sd_netlink_message_open_container(req, IFLA_MACVLAN_MACADDR_DATA);
  34                 if (r < 0)
  35                         return log_netdev_error_errno(netdev, r, "Could not open IFLA_MACVLAN_MACADDR_DATA container: %m");
  36
  37                 SET_FOREACH(mac_addr, m->match_source_mac) {
  38                         r = sd_netlink_message_append_ether_addr(req, IFLA_MACVLAN_MACADDR, mac_addr);
  39                         if (r < 0)
  40                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MACADDR attribute: %m");
  41                 }
  42
  43                 r = sd_netlink_message_close_container(req);
  44                 if (r < 0)
  45                         return log_netdev_error_errno(netdev, r, "Could not close IFLA_MACVLAN_MACADDR_DATA container: %m");
  46         }
  47
  48         if (m->mode != _NETDEV_MACVLAN_MODE_INVALID) {
  49                 r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MODE, m->mode);
  50                 if (r < 0)
  51                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MODE attribute: %m");
  52         }
  53
  54         return 0;
  55 }
  56
  57 static void macvlan_done(NetDev *n) {
  58         MacVlan *m;
  59
  60         assert(n);
  61
  62         if (n->kind == NETDEV_KIND_MACVLAN)
  63                 m = MACVLAN(n);
  64         else
  65                 m = MACVTAP(n);
  66
  67         assert(m);
  68
  69         set_free_free(m->match_source_mac);
  70 }
  71
  72 static void macvlan_init(NetDev *n) {
  73         MacVlan *m;
  74
  75         assert(n);
  76
  77         if (n->kind == NETDEV_KIND_MACVLAN)
  78                 m = MACVLAN(n);
  79         else
  80                 m = MACVTAP(n);
  81
  82         assert(m);
  83
  84         m->mode = _NETDEV_MACVLAN_MODE_INVALID;
  85 }
  86
  87 const NetDevVTable macvtap_vtable = {
  88         .object_size = sizeof(MacVlan),
  89         .init = macvlan_init,
  90         .done = macvlan_done,
  91         .sections = NETDEV_COMMON_SECTIONS "MACVTAP\0",
  92         .fill_message_create = netdev_macvlan_fill_message_create,
  93         .create_type = NETDEV_CREATE_STACKED,
  94         .generate_mac = true,
  95 };
  96
  97 const NetDevVTable macvlan_vtable = {
  98         .object_size = sizeof(MacVlan),
  99         .init = macvlan_init,
 100         .done = macvlan_done,
 101         .sections = NETDEV_COMMON_SECTIONS "MACVLAN\0",
 102         .fill_message_create = netdev_macvlan_fill_message_create,
 103         .create_type = NETDEV_CREATE_STACKED,
 104         .generate_mac = true,
 105 };