src/network/netdev/bridge.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4
   5 #include "bridge.h"
   6 #include "netlink-util.h"
   7 #include "network-internal.h"
   8 #include "networkd-manager.h"
   9 #include "string-table.h"
  10 #include "vlan-util.h"
  11
  12 static const char* const multicast_router_table[_MULTICAST_ROUTER_MAX] = {
  13         [MULTICAST_ROUTER_NONE] = "no",
  14         [MULTICAST_ROUTER_TEMPORARY_QUERY] = "query",
  15         [MULTICAST_ROUTER_PERMANENT] = "permanent",
  16         [MULTICAST_ROUTER_TEMPORARY] = "temporary",
  17 };
  18
  19 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(multicast_router, MulticastRouter, _MULTICAST_ROUTER_INVALID);
  20 DEFINE_CONFIG_PARSE_ENUM(config_parse_multicast_router, multicast_router, MulticastRouter,
  21                          "Failed to parse bridge multicast router setting");
  22
  23 /* callback for bridge netdev's parameter set */
  24 static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
  25         int r;
  26
  27         assert(netdev);
  28         assert(m);
  29
  30         r = sd_netlink_message_get_errno(m);
  31         if (r < 0) {
  32                 log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
  33                 return 1;
  34         }
  35
  36         log_netdev_debug(netdev, "Bridge parameters set success");
  37
  38         return 1;
  39 }
  40
  41 static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
  42         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
  43         Bridge *b;
  44         int r;
  45
  46         assert(netdev);
  47
  48         b = BRIDGE(netdev);
  49
  50         assert(b);
  51
  52         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex);
  53         if (r < 0)
  54                 return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
  55
  56         r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
  57         if (r < 0)
  58                 return log_link_error_errno(link, r, "Could not set netlink flags: %m");
  59
  60         r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
  61         if (r < 0)
  62                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
  63
  64         r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
  65         if (r < 0)
  66                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
  67
  68         /* convert to jiffes */
  69         if (b->forward_delay != USEC_INFINITY) {
  70                 r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay));
  71                 if (r < 0)
  72                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_FORWARD_DELAY attribute: %m");
  73         }
  74
  75         if (b->hello_time > 0) {
  76                 r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time));
  77                 if (r < 0)
  78                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_HELLO_TIME attribute: %m");
  79         }
  80
  81         if (b->max_age > 0) {
  82                 r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age));
  83                 if (r < 0)
  84                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MAX_AGE attribute: %m");
  85         }
  86
  87         if (b->ageing_time != USEC_INFINITY) {
  88                 r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time));
  89                 if (r < 0)
  90                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_AGEING_TIME attribute: %m");
  91         }
  92
  93         if (b->priority > 0) {
  94                 r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority);
  95                 if (r < 0)
  96                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_PRIORITY attribute: %m");
  97         }
  98
  99         if (b->group_fwd_mask > 0) {
 100                 r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask);
 101                 if (r < 0)
 102                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_GROUP_FWD_MASK attribute: %m");
 103         }
 104
 105         if (b->default_pvid != VLANID_INVALID) {
 106                 r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid);
 107                 if (r < 0)
 108                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_DEFAULT_PVID attribute: %m");
 109         }
 110
 111         if (b->mcast_querier >= 0) {
 112                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier);
 113                 if (r < 0)
 114                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_QUERIER attribute: %m");
 115         }
 116
 117         if (b->mcast_snooping >= 0) {
 118                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping);
 119                 if (r < 0)
 120                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_SNOOPING attribute: %m");
 121         }
 122
 123         if (b->vlan_filtering >= 0) {
 124                 r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering);
 125                 if (r < 0)
 126                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_VLAN_FILTERING attribute: %m");
 127         }
 128
 129         if (b->stp >= 0) {
 130                 r = sd_netlink_message_append_u32(req, IFLA_BR_STP_STATE, b->stp);
 131                 if (r < 0)
 132                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_STP_STATE attribute: %m");
 133         }
 134
 135         if (b->igmp_version > 0) {
 136                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_IGMP_VERSION, b->igmp_version);
 137                 if (r < 0)
 138                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_BR_MCAST_IGMP_VERSION attribute: %m");
 139         }
 140
 141         r = sd_netlink_message_close_container(req);
 142         if (r < 0)
 143                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 144
 145         r = sd_netlink_message_close_container(req);
 146         if (r < 0)
 147                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 148
 149         r = netlink_call_async(netdev->manager->rtnl, NULL, req, netdev_bridge_set_handler,
 150                                netdev_destroy_callback, netdev);
 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 int link_set_bridge_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
 160         int r;
 161
 162         assert(m);
 163         assert(link);
 164         assert(link->ifname);
 165
 166         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
 167                 return 1;
 168
 169         r = sd_netlink_message_get_errno(m);
 170         if (r < 0) {
 171                 log_link_warning_errno(link, r, "Could not set bridge interface: %m");
 172                 return 1;
 173         }
 174
 175         return 1;
 176 }
 177
 178 int link_set_bridge(Link *link) {
 179         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 180         int r;
 181
 182         assert(link);
 183         assert(link->network);
 184
 185         r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
 186         if (r < 0)
 187                 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
 188
 189         r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
 190         if (r < 0)
 191                 return log_link_error_errno(link, r, "Could not set message family: %m");
 192
 193         r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
 194         if (r < 0)
 195                 return log_link_error_errno(link, r, "Could not append IFLA_PROTINFO attribute: %m");
 196
 197         if (link->network->use_bpdu >= 0) {
 198                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
 199                 if (r < 0)
 200                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
 201         }
 202
 203         if (link->network->hairpin >= 0) {
 204                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
 205                 if (r < 0)
 206                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
 207         }
 208
 209         if (link->network->fast_leave >= 0) {
 210                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
 211                 if (r < 0)
 212                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
 213         }
 214
 215         if (link->network->allow_port_to_be_root >=  0) {
 216                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
 217                 if (r < 0)
 218                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
 219         }
 220
 221         if (link->network->unicast_flood >= 0) {
 222                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
 223                 if (r < 0)
 224                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
 225         }
 226
 227         if (link->network->multicast_flood >= 0) {
 228                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
 229                 if (r < 0)
 230                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
 231         }
 232
 233         if (link->network->multicast_to_unicast >= 0) {
 234                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
 235                 if (r < 0)
 236                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
 237         }
 238
 239         if (link->network->neighbor_suppression >= 0) {
 240                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
 241                 if (r < 0)
 242                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
 243         }
 244
 245         if (link->network->learning >= 0) {
 246                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
 247                 if (r < 0)
 248                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
 249         }
 250
 251         if (link->network->bridge_proxy_arp >= 0) {
 252                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp);
 253                 if (r < 0)
 254                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP attribute: %m");
 255         }
 256
 257         if (link->network->bridge_proxy_arp_wifi >= 0) {
 258                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi);
 259                 if (r < 0)
 260                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP_WIFI attribute: %m");
 261         }
 262
 263         if (link->network->cost != 0) {
 264                 r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
 265                 if (r < 0)
 266                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
 267         }
 268
 269         if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
 270                 r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
 271                 if (r < 0)
 272                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
 273         }
 274
 275         if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) {
 276                 r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router);
 277                 if (r < 0)
 278                         return log_link_error_errno(link, r, "Could not append IFLA_BRPORT_MULTICAST_ROUTER attribute: %m");
 279         }
 280
 281         r = sd_netlink_message_close_container(req);
 282         if (r < 0)
 283                 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
 284
 285         r = netlink_call_async(link->manager->rtnl, NULL, req, link_set_bridge_handler,
 286                                link_netlink_destroy_callback, link);
 287         if (r < 0)
 288                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 289
 290         link_ref(link);
 291
 292         return r;
 293 }
 294
 295 int config_parse_bridge_igmp_version(
 296                 const char *unit,
 297                 const char *filename,
 298                 unsigned line,
 299                 const char *section,
 300                 unsigned section_line,
 301                 const char *lvalue,
 302                 int ltype,
 303                 const char *rvalue,
 304                 void *data,
 305                 void *userdata) {
 306
 307         Bridge *b = userdata;
 308         uint8_t u;
 309         int r;
 310
 311         assert(filename);
 312         assert(lvalue);
 313         assert(rvalue);
 314         assert(data);
 315
 316         if (isempty(rvalue)) {
 317                 b->igmp_version = 0; /* 0 means unset. */
 318                 return 0;
 319         }
 320
 321         r = safe_atou8(rvalue, &u);
 322         if (r < 0) {
 323                 log_syntax(unit, LOG_ERR, filename, line, r,
 324                            "Failed to parse bridge's multicast IGMP version number '%s', ignoring assignment: %m",
 325                            rvalue);
 326                 return 0;
 327         }
 328         if (!IN_SET(u, 2, 3)) {
 329                 log_syntax(unit, LOG_ERR, filename, line, 0,
 330                            "Invalid bridge's multicast IGMP version number '%s', ignoring assignment.", rvalue);
 331                 return 0;
 332         }
 333
 334         b->igmp_version = u;
 335
 336         return 0;
 337 }
 338
 339 static void bridge_init(NetDev *n) {
 340         Bridge *b;
 341
 342         b = BRIDGE(n);
 343
 344         assert(b);
 345
 346         b->mcast_querier = -1;
 347         b->mcast_snooping = -1;
 348         b->vlan_filtering = -1;
 349         b->stp = -1;
 350         b->default_pvid = VLANID_INVALID;
 351         b->forward_delay = USEC_INFINITY;
 352         b->ageing_time = USEC_INFINITY;
 353 }
 354
 355 const NetDevVTable bridge_vtable = {
 356         .object_size = sizeof(Bridge),
 357         .init = bridge_init,
 358         .sections = "Match\0NetDev\0Bridge\0",
 359         .post_create = netdev_bridge_post_create,
 360         .create_type = NETDEV_CREATE_MASTER,
 361 };