src/network/netdev/bridge.c

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