src/network/netdev/bridge.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3     This file is part of systemd.
   4
   5     Copyright 2014  Tom Gundersen <teg@jklm.no>
   6     Copyright 2014  Susant Sahani
   7
   8     systemd is free software; you can redistribute it and/or modify it
   9     under the terms of the GNU Lesser General Public License as published by
  10     the Free Software Foundation; either version 2.1 of the License, or
  11     (at your option) any later version.
  12
  13     systemd is distributed in the hope that it will be useful, but
  14     WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16     Lesser General Public License for more details.
  17
  18     You should have received a copy of the GNU Lesser General Public License
  19     along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <net/if.h>
  23
  24 #include "missing.h"
  25 #include "netlink-util.h"
  26 #include "netdev/bridge.h"
  27 #include "networkd-manager.h"
  28 #include "vlan-util.h"
  29
  30 /* callback for brige netdev's parameter set */
  31 static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
  32         _cleanup_netdev_unref_ NetDev *netdev = userdata;
  33         int r;
  34
  35         assert(netdev);
  36         assert(m);
  37
  38         r = sd_netlink_message_get_errno(m);
  39         if (r < 0) {
  40                 log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
  41                 return 1;
  42         }
  43
  44         log_netdev_debug(netdev, "Bridge parameters set success");
  45
  46         return 1;
  47 }
  48
  49 static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
  50         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
  51         Bridge *b;
  52         int r;
  53
  54         assert(netdev);
  55
  56         b = BRIDGE(netdev);
  57
  58         assert(b);
  59
  60         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex);
  61         if (r < 0)
  62                 return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
  63
  64         r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
  65         if (r < 0)
  66                 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
  67
  68         r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
  69         if (r < 0)
  70                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_PROTINFO attribute: %m");
  71
  72         r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
  73         if (r < 0)
  74                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
  75
  76         /* convert to jiffes */
  77         if (b->forward_delay != USEC_INFINITY) {
  78                 r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay));
  79                 if (r < 0)
  80                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_FORWARD_DELAY attribute: %m");
  81         }
  82
  83         if (b->hello_time > 0) {
  84                 r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time));
  85                 if (r < 0)
  86                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_HELLO_TIME attribute: %m");
  87         }
  88
  89         if (b->max_age > 0) {
  90                 r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age));
  91                 if (r < 0)
  92                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MAX_AGE attribute: %m");
  93         }
  94
  95         if (b->ageing_time != USEC_INFINITY) {
  96                 r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time));
  97                 if (r < 0)
  98                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_AGEING_TIME attribute: %m");
  99         }
 100
 101         if (b->priority > 0) {
 102                 r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority);
 103                 if (r < 0)
 104                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_PRIORITY attribute: %m");
 105         }
 106
 107         if (b->group_fwd_mask > 0) {
 108                 r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask);
 109                 if (r < 0)
 110                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_GROUP_FWD_MASK attribute: %m");
 111         }
 112
 113         if (b->default_pvid != VLANID_INVALID) {
 114                 r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid);
 115                 if (r < 0)
 116                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_DEFAULT_PVID attribute: %m");
 117         }
 118
 119         if (b->mcast_querier >= 0) {
 120                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier);
 121                 if (r < 0)
 122                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_QUERIER attribute: %m");
 123         }
 124
 125         if (b->mcast_snooping >= 0) {
 126                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping);
 127                 if (r < 0)
 128                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_SNOOPING attribute: %m");
 129         }
 130
 131         if (b->vlan_filtering >= 0) {
 132                 r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering);
 133                 if (r < 0)
 134                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_FILTERING attribute: %m");
 135         }
 136
 137         if (b->stp >= 0) {
 138                 r = sd_netlink_message_append_u32(req, IFLA_BR_STP_STATE, b->stp);
 139                 if (r < 0)
 140                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_STP_STATE attribute: %m");
 141         }
 142
 143         r = sd_netlink_message_close_container(req);
 144         if (r < 0)
 145                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 146
 147         r = sd_netlink_message_close_container(req);
 148         if (r < 0)
 149                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 150
 151         r = sd_netlink_call_async(netdev->manager->rtnl, req, netdev_bridge_set_handler, netdev, 0, NULL);
 152         if (r < 0)
 153                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 154
 155         netdev_ref(netdev);
 156
 157         return r;
 158 }
 159
 160 static void bridge_init(NetDev *n) {
 161         Bridge *b;
 162
 163         b = BRIDGE(n);
 164
 165         assert(b);
 166
 167         b->mcast_querier = -1;
 168         b->mcast_snooping = -1;
 169         b->vlan_filtering = -1;
 170         b->stp = -1;
 171         b->default_pvid = VLANID_INVALID;
 172         b->forward_delay = USEC_INFINITY;
 173         b->ageing_time = USEC_INFINITY;
 174 }
 175
 176 const NetDevVTable bridge_vtable = {
 177         .object_size = sizeof(Bridge),
 178         .init = bridge_init,
 179         .sections = "Match\0NetDev\0Bridge\0",
 180         .post_create = netdev_bridge_post_create,
 181         .create_type = NETDEV_CREATE_MASTER,
 182 };