| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <netinet/in.h> |
| #include <linux/if.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_bridge.h> |
| |
| #include "missing_network.h" |
| #include "netif-util.h" |
| #include "netlink-util.h" |
| #include "networkd-address.h" |
| #include "networkd-can.h" |
| #include "networkd-link.h" |
| #include "networkd-manager.h" |
| #include "networkd-queue.h" |
| #include "networkd-setlink.h" |
| #include "networkd-sriov.h" |
| #include "networkd-wiphy.h" |
| |
| static int get_link_default_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| return link_getlink_handler_internal(rtnl, m, link, "Failed to sync link information"); |
| } |
| |
| static int get_link_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| if (get_link_default_handler(rtnl, m, link) > 0) |
| link->master_set = true; |
| return 0; |
| } |
| |
| static int get_link_update_flag_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| assert(link); |
| assert(link->set_flags_messages > 0); |
| |
| link->set_flags_messages--; |
| |
| return get_link_default_handler(rtnl, m, link); |
| } |
| |
| static int set_link_handler_internal( |
| sd_netlink *rtnl, |
| sd_netlink_message *m, |
| Request *req, |
| Link *link, |
| bool ignore, |
| link_netlink_message_handler_t get_link_handler) { |
| |
| int r; |
| |
| assert(m); |
| assert(req); |
| assert(link); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) { |
| const char *error_msg; |
| |
| error_msg = strjoina("Failed to set ", request_type_to_string(req->type), ignore ? ", ignoring" : ""); |
| log_link_message_warning_errno(link, m, r, error_msg); |
| |
| if (!ignore) |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| log_link_debug(link, "%s set.", request_type_to_string(req->type)); |
| |
| if (get_link_handler) { |
| r = link_call_getlink(link, get_link_handler); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 0; |
| } |
| } |
| |
| if (link->set_link_messages == 0) |
| link_check_ready(link); |
| |
| return 1; |
| } |
| |
| static int link_set_addrgen_mode_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| int r; |
| |
| r = set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, NULL); |
| if (r <= 0) |
| return r; |
| |
| r = link_drop_ipv6ll_addresses(link); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to drop IPv6LL addresses: %m"); |
| link_enter_failed(link); |
| } |
| |
| return 0; |
| } |
| |
| static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, NULL); |
| } |
| |
| static int link_set_bridge_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, NULL); |
| } |
| |
| static int link_set_bridge_vlan_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, NULL); |
| } |
| |
| static int link_set_can_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, NULL); |
| } |
| |
| static int link_set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, get_link_default_handler); |
| } |
| |
| static int link_set_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, NULL); |
| } |
| |
| static int link_set_ipoib_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, NULL); |
| } |
| |
| static int link_set_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, get_link_default_handler); |
| } |
| |
| static int link_set_mac_allow_retry_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r == -EBUSY) { |
| /* Most real network devices refuse to set its hardware address with -EBUSY when its |
| * operstate is not down. See, eth_prepare_mac_addr_change() in net/ethernet/eth.c |
| * of kernel. */ |
| |
| log_link_message_debug_errno(link, m, r, "Failed to set MAC address, retrying again: %m"); |
| |
| r = link_request_to_set_mac(link, /* allow_retry = */ false); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 0; |
| } |
| |
| return link_set_mac_handler(rtnl, m, req, link, userdata); |
| } |
| |
| static int link_set_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ false, get_link_master_handler); |
| } |
| |
| static int link_unset_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| /* Some devices do not support setting master ifindex. Let's ignore error on unsetting master ifindex. */ |
| return set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, get_link_master_handler); |
| } |
| |
| static int link_set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| int r; |
| |
| r = set_link_handler_internal(rtnl, m, req, link, /* ignore = */ true, get_link_default_handler); |
| if (r <= 0) |
| return r; |
| |
| /* The kernel resets ipv6 mtu after changing device mtu; |
| * we must set this here, after we've set device mtu */ |
| r = link_set_ipv6_mtu(link); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to set IPv6 MTU, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int link_configure_fill_message( |
| Link *link, |
| sd_netlink_message *req, |
| RequestType type, |
| void *userdata) { |
| int r; |
| |
| switch (type) { |
| case REQUEST_TYPE_SET_LINK_ADDRESS_GENERATION_MODE: |
| r = ipv6ll_addrgen_mode_fill_message(req, PTR_TO_UINT8(userdata)); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_BOND: |
| r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_open_container(req, IFLA_LINKINFO); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond"); |
| if (r < 0) |
| return r; |
| |
| if (link->network->active_slave) { |
| r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->primary_slave) { |
| r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return r; |
| |
| break; |
| case REQUEST_TYPE_SET_LINK_BRIDGE: |
| r = sd_rtnl_message_link_set_family(req, AF_BRIDGE); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_open_container(req, IFLA_PROTINFO); |
| if (r < 0) |
| return r; |
| |
| if (link->network->use_bpdu >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, !link->network->use_bpdu); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->hairpin >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->isolated >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_ISOLATED, link->network->isolated); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->fast_leave >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->allow_port_to_be_root >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, !link->network->allow_port_to_be_root); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->unicast_flood >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->multicast_flood >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->multicast_to_unicast >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->neighbor_suppression >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->learning >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->bridge_proxy_arp >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->bridge_proxy_arp_wifi >= 0) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->cost != 0) { |
| r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) { |
| r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) { |
| r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_BRIDGE_VLAN: |
| r = sd_rtnl_message_link_set_family(req, AF_BRIDGE); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); |
| if (r < 0) |
| return r; |
| |
| if (link->master_ifindex <= 0) { |
| /* master needs BRIDGE_FLAGS_SELF flag */ |
| r = sd_netlink_message_append_u16(req, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF); |
| if (r < 0) |
| return r; |
| } |
| |
| r = bridge_vlan_append_info(link, req, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_close_container(req); |
| if (r < 0) |
| return r; |
| |
| break; |
| case REQUEST_TYPE_SET_LINK_CAN: |
| r = can_set_netlink_message(link, req); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_FLAGS: { |
| unsigned ifi_change = 0, ifi_flags = 0; |
| |
| if (link->network->arp >= 0) { |
| ifi_change |= IFF_NOARP; |
| SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); |
| } |
| |
| if (link->network->multicast >= 0) { |
| ifi_change |= IFF_MULTICAST; |
| SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); |
| } |
| |
| if (link->network->allmulticast >= 0) { |
| ifi_change |= IFF_ALLMULTI; |
| SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); |
| } |
| |
| if (link->network->promiscuous >= 0) { |
| ifi_change |= IFF_PROMISC; |
| SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous); |
| } |
| |
| r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); |
| if (r < 0) |
| return r; |
| |
| break; |
| } |
| case REQUEST_TYPE_SET_LINK_GROUP: |
| r = sd_netlink_message_append_u32(req, IFLA_GROUP, (uint32_t) link->network->group); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_MAC: |
| r = netlink_message_append_hw_addr(req, IFLA_ADDRESS, &link->requested_hw_addr); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_IPOIB: |
| r = ipoib_set_netlink_message(link, req); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_MASTER: |
| r = sd_netlink_message_append_u32(req, IFLA_MASTER, PTR_TO_UINT32(userdata)); |
| if (r < 0) |
| return r; |
| break; |
| case REQUEST_TYPE_SET_LINK_MTU: |
| r = sd_netlink_message_append_u32(req, IFLA_MTU, PTR_TO_UINT32(userdata)); |
| if (r < 0) |
| return r; |
| break; |
| default: |
| assert_not_reached(); |
| } |
| |
| return 0; |
| } |
| |
| static int link_configure(Link *link, Request *req) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(req); |
| |
| log_link_debug(link, "Setting %s", request_type_to_string(req->type)); |
| |
| if (req->type == REQUEST_TYPE_SET_LINK_BOND) |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->master_ifindex); |
| else if (IN_SET(req->type, REQUEST_TYPE_SET_LINK_CAN, REQUEST_TYPE_SET_LINK_IPOIB)) |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, link->ifindex); |
| else |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = link_configure_fill_message(link, m, req->type, req->userdata); |
| if (r < 0) |
| return r; |
| |
| return request_call_netlink_async(link->manager->rtnl, m, req); |
| } |
| |
| static bool netdev_is_ready(NetDev *netdev) { |
| assert(netdev); |
| |
| if (netdev->state != NETDEV_STATE_READY) |
| return false; |
| if (netdev->ifindex == 0) |
| return false; |
| |
| return true; |
| } |
| |
| static int link_is_ready_to_set_link(Link *link, Request *req) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->network); |
| assert(req); |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| return false; |
| |
| switch (req->type) { |
| case REQUEST_TYPE_SET_LINK_BOND: |
| case REQUEST_TYPE_SET_LINK_BRIDGE: |
| if (!link->master_set) |
| return false; |
| |
| if (link->network->keep_master && link->master_ifindex <= 0) |
| return false; |
| break; |
| |
| case REQUEST_TYPE_SET_LINK_BRIDGE_VLAN: |
| if (!link->master_set) |
| return false; |
| |
| if (link->network->keep_master && link->master_ifindex <= 0 && !streq_ptr(link->kind, "bridge")) |
| return false; |
| |
| break; |
| |
| case REQUEST_TYPE_SET_LINK_CAN: |
| /* Do not check link->set_flgas_messages here, as it is ok even if link->flags |
| * is outdated, and checking the counter causes a deadlock. */ |
| if (FLAGS_SET(link->flags, IFF_UP)) { |
| /* The CAN interface must be down to configure bitrate, etc... */ |
| r = link_down_now(link); |
| if (r < 0) |
| return r; |
| } |
| break; |
| |
| case REQUEST_TYPE_SET_LINK_MAC: |
| if (req->netlink_handler == link_set_mac_handler) { |
| /* This is the second attempt to set hardware address. On the first attempt |
| * req->netlink_handler points to link_set_mac_allow_retry_handler(). |
| * The first attempt failed as the interface was up. */ |
| r = link_down_now(link); |
| if (r < 0) |
| return r; |
| |
| /* If the kind of the link is "bond", we need |
| * set the slave link down as well. */ |
| if (streq_ptr(link->kind, "bond")) { |
| r = link_down_slave_links(link); |
| if (r < 0) |
| return r; |
| } |
| } |
| break; |
| |
| case REQUEST_TYPE_SET_LINK_MASTER: { |
| uint32_t m = 0; |
| Request req_mac = { |
| .link = link, |
| .type = REQUEST_TYPE_SET_LINK_MAC, |
| }; |
| |
| if (link->network->batadv) { |
| if (!netdev_is_ready(link->network->batadv)) |
| return false; |
| m = link->network->batadv->ifindex; |
| } else if (link->network->bond) { |
| if (ordered_set_contains(link->manager->request_queue, &req_mac)) |
| return false; |
| if (!netdev_is_ready(link->network->bond)) |
| return false; |
| m = link->network->bond->ifindex; |
| |
| /* Do not check link->set_flgas_messages here, as it is ok even if link->flags |
| * is outdated, and checking the counter causes a deadlock. */ |
| if (FLAGS_SET(link->flags, IFF_UP)) { |
| /* link must be down when joining to bond master. */ |
| r = link_down_now(link); |
| if (r < 0) |
| return r; |
| } |
| } else if (link->network->bridge) { |
| if (ordered_set_contains(link->manager->request_queue, &req_mac)) |
| return false; |
| if (!netdev_is_ready(link->network->bridge)) |
| return false; |
| m = link->network->bridge->ifindex; |
| } else if (link->network->vrf) { |
| if (!netdev_is_ready(link->network->vrf)) |
| return false; |
| m = link->network->vrf->ifindex; |
| } |
| |
| if (m == (uint32_t) link->master_ifindex) { |
| /* The requested master is already set. */ |
| link->master_set = true; |
| return -EALREADY; /* indicate to cancel the request. */ |
| } |
| |
| req->userdata = UINT32_TO_PTR(m); |
| break; |
| } |
| case REQUEST_TYPE_SET_LINK_MTU: { |
| Request req_ipoib = { |
| .link = link, |
| .type = REQUEST_TYPE_SET_LINK_IPOIB, |
| }; |
| |
| return !ordered_set_contains(link->manager->request_queue, &req_ipoib); |
| } |
| default: |
| break; |
| } |
| |
| return true; |
| } |
| |
| static int link_process_set_link(Request *req, Link *link, void *userdata) { |
| int r; |
| |
| assert(req); |
| assert(link); |
| |
| r = link_is_ready_to_set_link(link, req); |
| if (r == -EALREADY) |
| return 1; /* Cancel the request. */ |
| if (r <= 0) |
| return r; |
| |
| r = link_configure(link, req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to set %s", request_type_to_string(req->type)); |
| |
| return 1; |
| } |
| |
| static int link_request_set_link( |
| Link *link, |
| RequestType type, |
| request_netlink_handler_t netlink_handler, |
| Request **ret) { |
| |
| Request *req; |
| int r; |
| |
| assert(link); |
| |
| r = link_queue_request_full(link, type, NULL, NULL, NULL, NULL, |
| link_process_set_link, |
| &link->set_link_messages, |
| netlink_handler, |
| &req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to request to set %s: %m", |
| request_type_to_string(type)); |
| |
| log_link_debug(link, "Requested to set %s", request_type_to_string(type)); |
| |
| if (ret) |
| *ret = req; |
| return 0; |
| } |
| |
| int link_request_to_set_addrgen_mode(Link *link) { |
| IPv6LinkLocalAddressGenMode mode; |
| Request *req; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| if (!socket_ipv6_is_supported()) |
| return 0; |
| |
| mode = link_get_ipv6ll_addrgen_mode(link); |
| |
| if (mode == link->ipv6ll_address_gen_mode) |
| return 0; |
| |
| /* If the link is already up, then changing the mode by netlink does not take effect until the |
| * link goes down. Hence, we need to reset the interface. However, setting the mode by sysctl |
| * does not need that. Let's use the sysctl interface when the link is already up. |
| * See also issue #22424. */ |
| if (mode != IPV6_LINK_LOCAL_ADDRESSS_GEN_MODE_NONE && |
| FLAGS_SET(link->flags, IFF_UP)) { |
| r = link_set_ipv6ll_addrgen_mode(link, mode); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot set IPv6 address generation mode, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| r = link_request_set_link(link, REQUEST_TYPE_SET_LINK_ADDRESS_GENERATION_MODE, |
| link_set_addrgen_mode_handler, |
| &req); |
| if (r < 0) |
| return r; |
| |
| req->userdata = UINT8_TO_PTR(mode); |
| return 0; |
| } |
| |
| int link_request_to_set_bond(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (!link->network->bond) { |
| Link *master; |
| |
| if (!link->network->keep_master) |
| return 0; |
| |
| if (link_get_master(link, &master) < 0) |
| return 0; |
| |
| if (!streq_ptr(master->kind, "bond")) |
| return 0; |
| } |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_BOND, |
| link_set_bond_handler, NULL); |
| } |
| |
| int link_request_to_set_bridge(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (!link->network->bridge) { |
| Link *master; |
| |
| if (!link->network->keep_master) |
| return 0; |
| |
| if (link_get_master(link, &master) < 0) |
| return 0; |
| |
| if (!streq_ptr(master->kind, "bridge")) |
| return 0; |
| } |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_BRIDGE, |
| link_set_bridge_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_bridge_vlan(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (!link->network->use_br_vlan) |
| return 0; |
| |
| if (!link->network->bridge && !streq_ptr(link->kind, "bridge")) { |
| Link *master; |
| |
| if (!link->network->keep_master) |
| return 0; |
| |
| if (link_get_master(link, &master) < 0) |
| return 0; |
| |
| if (!streq_ptr(master->kind, "bridge")) |
| return 0; |
| } |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_BRIDGE_VLAN, |
| link_set_bridge_vlan_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_can(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->iftype != ARPHRD_CAN) |
| return 0; |
| |
| if (!streq_ptr(link->kind, "can")) |
| return 0; |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_CAN, |
| link_set_can_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_flags(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->arp < 0 && |
| link->network->multicast < 0 && |
| link->network->allmulticast < 0 && |
| link->network->promiscuous < 0) |
| return 0; |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_FLAGS, |
| link_set_flags_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_group(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->group < 0) |
| return 0; |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_GROUP, |
| link_set_group_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_mac(Link *link, bool allow_retry) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->hw_addr.length == 0) |
| return 0; |
| |
| link->requested_hw_addr = link->network->hw_addr; |
| r = net_verify_hardware_address(link->ifname, /* is_static = */ true, |
| link->iftype, &link->hw_addr, &link->requested_hw_addr); |
| if (r < 0) |
| return r; |
| |
| if (hw_addr_equal(&link->hw_addr, &link->requested_hw_addr)) |
| return 0; |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_MAC, |
| allow_retry ? link_set_mac_allow_retry_handler : link_set_mac_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_ipoib(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->iftype != ARPHRD_INFINIBAND) |
| return 0; |
| |
| if (link->network->ipoib_mode < 0 && |
| link->network->ipoib_umcast < 0) |
| return 0; |
| |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_IPOIB, |
| link_set_ipoib_handler, |
| NULL); |
| } |
| |
| int link_request_to_set_master(Link *link) { |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->keep_master) { |
| /* When KeepMaster=yes, BatmanAdvanced=, Bond=, Bridge=, and VRF= are ignored. */ |
| link->master_set = true; |
| return 0; |
| |
| } else if (link->network->batadv || link->network->bond || link->network->bridge || link->network->vrf) { |
| link->master_set = false; |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_MASTER, |
| link_set_master_handler, |
| NULL); |
| |
| } else if (link->master_ifindex != 0) { |
| /* Unset master only when it is set. */ |
| link->master_set = false; |
| return link_request_set_link(link, REQUEST_TYPE_SET_LINK_MASTER, |
| link_unset_master_handler, |
| NULL); |
| |
| } else { |
| /* Nothing we need to do. */ |
| link->master_set = true; |
| return 0; |
| } |
| } |
| |
| int link_request_to_set_mtu(Link *link, uint32_t mtu) { |
| const char *origin; |
| uint32_t min_mtu; |
| Request *req; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| min_mtu = link->min_mtu; |
| origin = "the minimum MTU of the interface"; |
| if (link_ipv6_enabled(link)) { |
| /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes on the interface. Bump up |
| * MTU bytes to IPV6_MTU_MIN. */ |
| if (min_mtu < IPV6_MIN_MTU) { |
| min_mtu = IPV6_MIN_MTU; |
| origin = "the minimum IPv6 MTU"; |
| } |
| if (min_mtu < link->network->ipv6_mtu) { |
| min_mtu = link->network->ipv6_mtu; |
| origin = "the requested IPv6 MTU in IPv6MTUBytes="; |
| } |
| } |
| |
| if (mtu < min_mtu) { |
| log_link_warning(link, "Bumping the requested MTU %"PRIu32" to %s (%"PRIu32")", |
| mtu, origin, min_mtu); |
| mtu = min_mtu; |
| } |
| |
| if (mtu > link->max_mtu) { |
| log_link_warning(link, "Reducing the requested MTU %"PRIu32" to the interface's maximum MTU %"PRIu32".", |
| mtu, link->max_mtu); |
| mtu = link->max_mtu; |
| } |
| |
| if (link->mtu == mtu) |
| return 0; |
| |
| r = link_request_set_link(link, REQUEST_TYPE_SET_LINK_MTU, |
| link_set_mtu_handler, |
| &req); |
| if (r < 0) |
| return r; |
| |
| req->userdata = UINT32_TO_PTR(mtu); |
| return 0; |
| } |
| |
| static bool link_reduces_vlan_mtu(Link *link) { |
| /* See netif_reduces_vlan_mtu() in kernel. */ |
| return streq_ptr(link->kind, "macsec"); |
| } |
| |
| static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { |
| uint32_t mtu = 0; |
| NetDev *dev; |
| |
| HASHMAP_FOREACH(dev, link->network->stacked_netdevs) |
| if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) |
| /* See vlan_dev_change_mtu() in kernel. */ |
| mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); |
| |
| else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) |
| /* See macvlan_change_mtu() in kernel. */ |
| mtu = dev->mtu; |
| |
| return mtu; |
| } |
| |
| int link_configure_mtu(Link *link) { |
| uint32_t mtu; |
| |
| assert(link); |
| assert(link->network); |
| |
| if (link->network->mtu > 0) |
| return link_request_to_set_mtu(link, link->network->mtu); |
| |
| mtu = link_get_requested_mtu_by_stacked_netdevs(link); |
| if (link->mtu >= mtu) |
| return 0; |
| |
| log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " |
| "If it is not desired, then please explicitly specify MTUBytes= setting.", |
| link->mtu, mtu); |
| |
| return link_request_to_set_mtu(link, mtu); |
| } |
| |
| static int link_up_dsa_slave(Link *link) { |
| Link *master; |
| int r; |
| |
| assert(link); |
| |
| /* For older kernels (specifically, older than 9d5ef190e5615a7b63af89f88c4106a5bc127974, kernel-5.12), |
| * it is necessary to bring up a DSA slave that its master interface is already up. And bringing up |
| * the slave fails with -ENETDOWN. So, let's bring up the master even if it is not managed by us, |
| * and try to bring up the slave after the master becomes up. */ |
| |
| if (link->dsa_master_ifindex <= 0) |
| return 0; |
| |
| if (!streq_ptr(link->driver, "dsa")) |
| return 0; |
| |
| if (link_get_by_index(link->manager, link->dsa_master_ifindex, &master) < 0) |
| return 0; |
| |
| if (master->state == LINK_STATE_UNMANAGED) { |
| /* If the DSA master interface is unmanaged, then it will never become up. |
| * Let's request to bring up the master. */ |
| r = link_request_to_bring_up_or_down(master, /* up = */ true); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_request_to_bring_up_or_down(link, /* up = */ true); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static int link_up_or_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { |
| bool on_activate, up; |
| int r; |
| |
| assert(m); |
| assert(req); |
| assert(link); |
| |
| on_activate = req->type == REQUEST_TYPE_ACTIVATE_LINK; |
| up = PTR_TO_INT(req->userdata); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r == -ENETDOWN && up && link_up_dsa_slave(link) > 0) |
| log_link_message_debug_errno(link, m, r, "Could not bring up dsa slave, retrying again after dsa master becomes up"); |
| else if (r < 0) |
| log_link_message_warning_errno(link, m, r, up ? |
| "Could not bring up interface, ignoring" : |
| "Could not bring down interface, ignoring"); |
| |
| r = link_call_getlink(link, get_link_update_flag_handler); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| link->set_flags_messages++; |
| |
| if (on_activate) { |
| link->activated = true; |
| link_check_ready(link); |
| } |
| |
| return 0; |
| } |
| |
| static const char *up_or_down(bool up) { |
| return up ? "up" : "down"; |
| } |
| |
| static int link_up_or_down(Link *link, bool up, Request *req) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| assert(req); |
| |
| log_link_debug(link, "Bringing link %s", up_or_down(up)); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_link_set_flags(m, up ? IFF_UP : 0, IFF_UP); |
| if (r < 0) |
| return r; |
| |
| return request_call_netlink_async(link->manager->rtnl, m, req); |
| } |
| |
| static bool link_is_ready_to_activate_one(Link *link, bool allow_unmanaged) { |
| assert(link); |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) |
| return false; |
| |
| if (!link->network) |
| return allow_unmanaged; |
| |
| if (link->set_link_messages > 0) |
| return false; |
| |
| return true; |
| } |
| |
| static bool link_is_ready_to_activate(Link *link, bool up) { |
| assert(link); |
| |
| if (!check_ready_for_all_sr_iov_ports(link, /* allow_unmanaged = */ false, |
| link_is_ready_to_activate_one)) |
| return false; |
| |
| if (up && link_rfkilled(link) > 0) |
| return false; |
| |
| return true; |
| } |
| |
| static int link_process_activation(Request *req, Link *link, void *userdata) { |
| bool up = PTR_TO_INT(userdata); |
| int r; |
| |
| assert(req); |
| assert(link); |
| |
| if (!link_is_ready_to_activate(link, up)) |
| return 0; |
| |
| r = link_up_or_down(link, up, req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to activate link: %m"); |
| |
| return 1; |
| } |
| |
| int link_request_to_activate(Link *link) { |
| bool up; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| switch (link->network->activation_policy) { |
| case ACTIVATION_POLICY_BOUND: |
| r = link_handle_bound_to_list(link); |
| if (r < 0) |
| return r; |
| _fallthrough_; |
| case ACTIVATION_POLICY_MANUAL: |
| link->activated = true; |
| link_check_ready(link); |
| return 0; |
| case ACTIVATION_POLICY_UP: |
| case ACTIVATION_POLICY_ALWAYS_UP: |
| up = true; |
| break; |
| case ACTIVATION_POLICY_DOWN: |
| case ACTIVATION_POLICY_ALWAYS_DOWN: |
| up = false; |
| break; |
| default: |
| assert_not_reached(); |
| } |
| |
| link->activated = false; |
| |
| r = link_queue_request_full(link, REQUEST_TYPE_ACTIVATE_LINK, |
| INT_TO_PTR(up), NULL, NULL, NULL, |
| link_process_activation, |
| &link->set_flags_messages, |
| link_up_or_down_handler, NULL); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Failed to request to activate link: %m"); |
| |
| log_link_debug(link, "Requested to activate link"); |
| return 0; |
| } |
| |
| static bool link_is_ready_to_bring_up_or_down(Link *link, bool up) { |
| assert(link); |
| |
| if (up && link->dsa_master_ifindex > 0) { |
| Link *master; |
| |
| /* The master interface must be up. See comments in link_up_dsa_slave(). */ |
| |
| if (link_get_by_index(link->manager, link->dsa_master_ifindex, &master) < 0) |
| return false; |
| |
| if (!FLAGS_SET(master->flags, IFF_UP)) |
| return false; |
| } |
| |
| if (link->state == LINK_STATE_UNMANAGED) |
| return true; |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| return false; |
| |
| if (link->set_link_messages > 0) |
| return false; |
| |
| if (!link->activated) |
| return false; |
| |
| if (up && link_rfkilled(link) > 0) |
| return false; |
| |
| return true; |
| } |
| |
| static int link_process_up_or_down(Request *req, Link *link, void *userdata) { |
| bool up = PTR_TO_INT(userdata); |
| int r; |
| |
| assert(req); |
| assert(link); |
| |
| if (!link_is_ready_to_bring_up_or_down(link, up)) |
| return 0; |
| |
| r = link_up_or_down(link, up, req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to bring link %s: %m", up_or_down(up)); |
| |
| return 1; |
| } |
| |
| int link_request_to_bring_up_or_down(Link *link, bool up) { |
| int r; |
| |
| assert(link); |
| |
| r = link_queue_request_full(link, REQUEST_TYPE_UP_DOWN, |
| INT_TO_PTR(up), NULL, NULL, NULL, |
| link_process_up_or_down, |
| &link->set_flags_messages, |
| link_up_or_down_handler, NULL); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to request to bring link %s: %m", |
| up_or_down(up)); |
| |
| log_link_debug(link, "Requested to bring link %s", up_or_down(up)); |
| return 0; |
| } |
| |
| static int link_down_now_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(link->set_flags_messages > 0); |
| |
| link->set_flags_messages--; |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not bring down interface, ignoring"); |
| |
| r = link_call_getlink(link, get_link_update_flag_handler); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| link->set_flags_messages++; |
| return 0; |
| } |
| |
| int link_down_now(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_link_debug(link, "Bringing link down"); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); |
| |
| r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set link flags: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, link_down_now_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link->set_flags_messages++; |
| link_ref(link); |
| return 0; |
| } |
| |
| int link_down_slave_links(Link *link) { |
| Link *slave; |
| int r; |
| |
| assert(link); |
| |
| SET_FOREACH(slave, link->slaves) { |
| r = link_down_now(slave); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0) |
| log_link_message_warning_errno(link, m, r, "Could not remove interface, ignoring"); |
| |
| return 0; |
| } |
| |
| int link_remove(Link *link) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| |
| log_link_debug(link, "Removing link."); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_DELLINK, link->ifindex); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not allocate RTM_DELLINK message: %m"); |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, link_remove_handler, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not send rtnetlink message: %m"); |
| |
| link_ref(link); |
| |
| return 0; |
| } |
