src/network/netdev/bridge.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <net/if.h>
   4 #include <netinet/in.h>
   5 #include <linux/if_arp.h>
   6 #include <linux/if_bridge.h>
   7
   8 #include "bridge.h"
   9 #include "netlink-util.h"
  10 #include "networkd-manager.h"
  11 #include "string-table.h"
  12 #include "vlan-util.h"
  13
  14 assert_cc((int) MULTICAST_ROUTER_NONE            == (int) MDB_RTR_TYPE_DISABLED);
  15 assert_cc((int) MULTICAST_ROUTER_TEMPORARY_QUERY == (int) MDB_RTR_TYPE_TEMP_QUERY);
  16 assert_cc((int) MULTICAST_ROUTER_PERMANENT       == (int) MDB_RTR_TYPE_PERM);
  17 assert_cc((int) MULTICAST_ROUTER_TEMPORARY       == (int) MDB_RTR_TYPE_TEMP);
  18
  19 static const char* const multicast_router_table[_MULTICAST_ROUTER_MAX] = {
  20         [MULTICAST_ROUTER_NONE]            = "no",
  21         [MULTICAST_ROUTER_TEMPORARY_QUERY] = "query",
  22         [MULTICAST_ROUTER_PERMANENT]       = "permanent",
  23         [MULTICAST_ROUTER_TEMPORARY]       = "temporary",
  24 };
  25
  26 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(multicast_router, MulticastRouter, _MULTICAST_ROUTER_INVALID);
  27 DEFINE_CONFIG_PARSE_ENUM(config_parse_multicast_router, multicast_router, MulticastRouter,
  28                          "Failed to parse bridge multicast router setting");
  29
  30 /* callback for bridge netdev's parameter set */
  31 static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
  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_message(NetDev *netdev, sd_netlink_message *req) {
  49         Bridge *b;
  50         int r;
  51
  52         assert_se(b = BRIDGE(netdev));
  53
  54         r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
  55         if (r < 0)
  56                 return r;
  57
  58         r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
  59         if (r < 0)
  60                 return r;
  61
  62         /* convert to jiffes */
  63         if (b->forward_delay != USEC_INFINITY) {
  64                 r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay));
  65                 if (r < 0)
  66                         return r;
  67         }
  68
  69         if (b->hello_time > 0) {
  70                 r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time));
  71                 if (r < 0)
  72                         return r;
  73         }
  74
  75         if (b->max_age > 0) {
  76                 r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age));
  77                 if (r < 0)
  78                         return r;
  79         }
  80
  81         if (b->ageing_time != USEC_INFINITY) {
  82                 r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time));
  83                 if (r < 0)
  84                         return r;
  85         }
  86
  87         if (b->priority > 0) {
  88                 r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority);
  89                 if (r < 0)
  90                         return r;
  91         }
  92
  93         if (b->group_fwd_mask > 0) {
  94                 r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask);
  95                 if (r < 0)
  96                         return r;
  97         }
  98
  99         if (b->default_pvid != VLANID_INVALID) {
 100                 r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid);
 101                 if (r < 0)
 102                         return r;
 103         }
 104
 105         if (b->mcast_querier >= 0) {
 106                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier);
 107                 if (r < 0)
 108                         return r;
 109         }
 110
 111         if (b->mcast_snooping >= 0) {
 112                 r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping);
 113                 if (r < 0)
 114                         return r;
 115         }
 116
 117         if (b->vlan_filtering >= 0) {
 118                 r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering);
 119                 if (r < 0)
 120                         return r;
 121         }
 122
 123         if (b->vlan_protocol >= 0) {
 124                 r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_PROTOCOL, b->vlan_protocol);
 125                 if (r < 0)
 126                         return r;
 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 r;
 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 r;
 139         }
 140
 141         r = sd_netlink_message_close_container(req);
 142         if (r < 0)
 143                 return r;
 144
 145         r = sd_netlink_message_close_container(req);
 146         if (r < 0)
 147                 return r;
 148
 149         return 0;
 150 }
 151
 152 static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
 153         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
 154         int r;
 155
 156         assert(netdev);
 157
 158         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex);
 159         if (r < 0)
 160                 return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m");
 161
 162         r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
 163         if (r < 0)
 164                 return log_link_error_errno(link, r, "Could not set netlink message flags: %m");
 165
 166         r = netdev_bridge_post_create_message(netdev, req);
 167         if (r < 0)
 168                 return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m");
 169
 170         r = netlink_call_async(netdev->manager->rtnl, NULL, req, netdev_bridge_set_handler,
 171                                netdev_destroy_callback, netdev);
 172         if (r < 0)
 173                 return log_netdev_error_errno(netdev, r, "Could not send netlink message: %m");
 174
 175         netdev_ref(netdev);
 176
 177         return r;
 178 }
 179
 180 int config_parse_bridge_igmp_version(
 181                 const char *unit,
 182                 const char *filename,
 183                 unsigned line,
 184                 const char *section,
 185                 unsigned section_line,
 186                 const char *lvalue,
 187                 int ltype,
 188                 const char *rvalue,
 189                 void *data,
 190                 void *userdata) {
 191
 192         Bridge *b = userdata;
 193         uint8_t u;
 194         int r;
 195
 196         assert(filename);
 197         assert(lvalue);
 198         assert(rvalue);
 199         assert(data);
 200
 201         if (isempty(rvalue)) {
 202                 b->igmp_version = 0; /* 0 means unset. */
 203                 return 0;
 204         }
 205
 206         r = safe_atou8(rvalue, &u);
 207         if (r < 0) {
 208                 log_syntax(unit, LOG_WARNING, filename, line, r,
 209                            "Failed to parse bridge's multicast IGMP version number '%s', ignoring assignment: %m",
 210                            rvalue);
 211                 return 0;
 212         }
 213         if (!IN_SET(u, 2, 3)) {
 214                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 215                            "Invalid bridge's multicast IGMP version number '%s', ignoring assignment.", rvalue);
 216                 return 0;
 217         }
 218
 219         b->igmp_version = u;
 220
 221         return 0;
 222 }
 223
 224 int config_parse_bridge_port_priority(
 225                 const char *unit,
 226                 const char *filename,
 227                 unsigned line,
 228                 const char *section,
 229                 unsigned section_line,
 230                 const char *lvalue,
 231                 int ltype,
 232                 const char *rvalue,
 233                 void *data,
 234                 void *userdata) {
 235
 236         uint16_t i;
 237         int r;
 238
 239         assert(filename);
 240         assert(lvalue);
 241         assert(rvalue);
 242         assert(data);
 243
 244         /* This is used in networkd-network-gperf.gperf. */
 245
 246         r = safe_atou16(rvalue, &i);
 247         if (r < 0) {
 248                 log_syntax(unit, LOG_WARNING, filename, line, r,
 249                            "Failed to parse bridge port priority, ignoring: %s", rvalue);
 250                 return 0;
 251         }
 252
 253         if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
 254                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 255                            "Bridge port priority is larger than maximum %u, ignoring: %s",
 256                            LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
 257                 return 0;
 258         }
 259
 260         *((uint16_t *)data) = i;
 261
 262         return 0;
 263 }
 264
 265 static void bridge_init(NetDev *n) {
 266         Bridge *b;
 267
 268         b = BRIDGE(n);
 269
 270         assert(b);
 271
 272         b->mcast_querier = -1;
 273         b->mcast_snooping = -1;
 274         b->vlan_filtering = -1;
 275         b->vlan_protocol = -1;
 276         b->stp = -1;
 277         b->default_pvid = VLANID_INVALID;
 278         b->forward_delay = USEC_INFINITY;
 279         b->ageing_time = USEC_INFINITY;
 280 }
 281
 282 const NetDevVTable bridge_vtable = {
 283         .object_size = sizeof(Bridge),
 284         .init = bridge_init,
 285         .sections = NETDEV_COMMON_SECTIONS "Bridge\0",
 286         .post_create = netdev_bridge_post_create,
 287         .create_type = NETDEV_CREATE_MASTER,
 288         .iftype = ARPHRD_ETHER,
 289         .generate_mac = true,
 290 };