| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <linux/if.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_link.h> |
| #include <linux/netdevice.h> |
| #include <sys/socket.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "arphrd-util.h" |
| #include "batadv.h" |
| #include "bond.h" |
| #include "bridge.h" |
| #include "bus-util.h" |
| #include "device-private.h" |
| #include "device-util.h" |
| #include "dhcp-identifier.h" |
| #include "dhcp-lease-internal.h" |
| #include "env-file.h" |
| #include "ethtool-util.h" |
| #include "event-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "format-util.h" |
| #include "fs-util.h" |
| #include "glyph-util.h" |
| #include "logarithm.h" |
| #include "missing_network.h" |
| #include "netlink-util.h" |
| #include "network-internal.h" |
| #include "networkd-address-label.h" |
| #include "networkd-address.h" |
| #include "networkd-bridge-fdb.h" |
| #include "networkd-bridge-mdb.h" |
| #include "networkd-can.h" |
| #include "networkd-dhcp-prefix-delegation.h" |
| #include "networkd-dhcp-server.h" |
| #include "networkd-dhcp4.h" |
| #include "networkd-dhcp6.h" |
| #include "networkd-ipv4acd.h" |
| #include "networkd-ipv4ll.h" |
| #include "networkd-ipv6-proxy-ndp.h" |
| #include "networkd-link-bus.h" |
| #include "networkd-link.h" |
| #include "networkd-lldp-tx.h" |
| #include "networkd-manager.h" |
| #include "networkd-ndisc.h" |
| #include "networkd-neighbor.h" |
| #include "networkd-nexthop.h" |
| #include "networkd-queue.h" |
| #include "networkd-radv.h" |
| #include "networkd-route.h" |
| #include "networkd-routing-policy-rule.h" |
| #include "networkd-setlink.h" |
| #include "networkd-sriov.h" |
| #include "networkd-state-file.h" |
| #include "networkd-sysctl.h" |
| #include "networkd-wifi.h" |
| #include "set.h" |
| #include "socket-util.h" |
| #include "stdio-util.h" |
| #include "string-table.h" |
| #include "strv.h" |
| #include "tc.h" |
| #include "tmpfile-util.h" |
| #include "tuntap.h" |
| #include "udev-util.h" |
| #include "vrf.h" |
| |
| bool link_ipv6_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link_may_have_ipv6ll(link, /* check_multicast = */ false)) |
| return true; |
| |
| if (network_has_static_ipv6_configurations(link->network)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_is_ready_to_configure_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->network->configure_without_carrier) { |
| if (link->set_flags_messages > 0) |
| return false; |
| |
| if (!link_has_carrier(link)) |
| return false; |
| } |
| |
| if (link->set_link_messages > 0) |
| return false; |
| |
| if (!link->activated) |
| return false; |
| |
| return true; |
| } |
| |
| bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
| return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one); |
| } |
| |
| void link_ntp_settings_clear(Link *link) { |
| link->ntp = strv_free(link->ntp); |
| } |
| |
| void link_dns_settings_clear(Link *link) { |
| if (link->n_dns != UINT_MAX) |
| for (unsigned i = 0; i < link->n_dns; i++) |
| in_addr_full_free(link->dns[i]); |
| link->dns = mfree(link->dns); |
| link->n_dns = UINT_MAX; |
| |
| link->search_domains = ordered_set_free(link->search_domains); |
| link->route_domains = ordered_set_free(link->route_domains); |
| |
| link->dns_default_route = -1; |
| link->llmnr = _RESOLVE_SUPPORT_INVALID; |
| link->mdns = _RESOLVE_SUPPORT_INVALID; |
| link->dnssec_mode = _DNSSEC_MODE_INVALID; |
| link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; |
| |
| link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); |
| } |
| |
| static void link_free_engines(Link *link) { |
| if (!link) |
| return; |
| |
| link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); |
| |
| link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); |
| link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); |
| link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name); |
| |
| link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); |
| link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx); |
| |
| link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); |
| |
| link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); |
| link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
| |
| link->ndisc = sd_ndisc_unref(link->ndisc); |
| link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire); |
| ndisc_flush(link); |
| |
| link->radv = sd_radv_unref(link->radv); |
| } |
| |
| static Link *link_free(Link *link) { |
| assert(link); |
| |
| link_ntp_settings_clear(link); |
| link_dns_settings_clear(link); |
| |
| link->routes = set_free(link->routes); |
| link->nexthops = set_free(link->nexthops); |
| link->neighbors = set_free(link->neighbors); |
| link->addresses = set_free(link->addresses); |
| link->qdiscs = set_free(link->qdiscs); |
| link->tclasses = set_free(link->tclasses); |
| |
| link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes); |
| |
| link_free_engines(link); |
| |
| set_free(link->sr_iov_virt_port_ifindices); |
| free(link->ifname); |
| strv_free(link->alternative_names); |
| free(link->kind); |
| free(link->ssid); |
| free(link->previous_ssid); |
| free(link->driver); |
| |
| unlink_and_free(link->lease_file); |
| unlink_and_free(link->lldp_file); |
| unlink_and_free(link->state_file); |
| |
| sd_device_unref(link->dev); |
| netdev_unref(link->netdev); |
| |
| hashmap_free(link->bound_to_links); |
| hashmap_free(link->bound_by_links); |
| |
| set_free_with_destructor(link->slaves, link_unref); |
| |
| network_unref(link->network); |
| |
| sd_event_source_disable_unref(link->carrier_lost_timer); |
| |
| return mfree(link); |
| } |
| |
| DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
| |
| int link_get_by_index(Manager *m, int ifindex, Link **ret) { |
| Link *link; |
| |
| assert(m); |
| assert(ifindex > 0); |
| |
| link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex)); |
| if (!link) |
| return -ENODEV; |
| |
| if (ret) |
| *ret = link; |
| return 0; |
| } |
| |
| int link_get_by_name(Manager *m, const char *ifname, Link **ret) { |
| Link *link; |
| |
| assert(m); |
| assert(ifname); |
| |
| link = hashmap_get(m->links_by_name, ifname); |
| if (!link) |
| return -ENODEV; |
| |
| if (ret) |
| *ret = link; |
| return 0; |
| } |
| |
| int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) { |
| Link *link; |
| |
| assert(m); |
| assert(hw_addr); |
| |
| link = hashmap_get(m->links_by_hw_addr, hw_addr); |
| if (!link) |
| return -ENODEV; |
| |
| if (ret) |
| *ret = link; |
| return 0; |
| } |
| |
| int link_get_master(Link *link, Link **ret) { |
| assert(link); |
| assert(link->manager); |
| assert(ret); |
| |
| if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex) |
| return -ENODEV; |
| |
| return link_get_by_index(link->manager, link->master_ifindex, ret); |
| } |
| |
| void link_set_state(Link *link, LinkState state) { |
| assert(link); |
| |
| if (link->state == state) |
| return; |
| |
| log_link_debug(link, "State changed: %s -> %s", |
| link_state_to_string(link->state), |
| link_state_to_string(state)); |
| |
| link->state = state; |
| |
| link_send_changed(link, "AdministrativeState", NULL); |
| link_dirty(link); |
| } |
| |
| int link_stop_engines(Link *link, bool may_keep_dhcp) { |
| int r = 0, k; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| bool keep_dhcp = may_keep_dhcp && |
| link->network && |
| !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */ |
| (link->manager->restarting || |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); |
| |
| if (!keep_dhcp) { |
| k = sd_dhcp_client_stop(link->dhcp_client); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
| } |
| |
| k = sd_dhcp_server_stop(link->dhcp_server); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); |
| |
| k = sd_lldp_rx_stop(link->lldp_rx); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m"); |
| |
| k = sd_lldp_tx_stop(link->lldp_tx); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m"); |
| |
| k = sd_ipv4ll_stop(link->ipv4ll); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); |
| |
| k = ipv4acd_stop(link); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); |
| |
| k = sd_dhcp6_client_stop(link->dhcp6_client); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); |
| |
| k = dhcp_pd_remove(link, /* only_marked = */ false); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); |
| |
| k = ndisc_stop(link); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); |
| |
| ndisc_flush(link); |
| |
| k = sd_radv_stop(link->radv); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); |
| |
| return r; |
| } |
| |
| void link_enter_failed(Link *link) { |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return; |
| |
| log_link_warning(link, "Failed"); |
| |
| link_set_state(link, LINK_STATE_FAILED); |
| |
| (void) link_stop_engines(link, false); |
| } |
| |
| void link_check_ready(Link *link) { |
| Address *a; |
| |
| assert(link); |
| |
| if (link->state == LINK_STATE_CONFIGURED) |
| return; |
| |
| if (link->state != LINK_STATE_CONFIGURING) |
| return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); |
| |
| if (!link->network) |
| return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__); |
| |
| if (!link->tc_configured) |
| return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); |
| |
| if (link->set_link_messages > 0) |
| return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__); |
| |
| if (!link->activated) |
| return (void) log_link_debug(link, "%s(): link is not activated.", __func__); |
| |
| if (link->iftype == ARPHRD_CAN) { |
| /* let's shortcut things for CAN which doesn't need most of checks below. */ |
| link_set_state(link, LINK_STATE_CONFIGURED); |
| return; |
| } |
| |
| if (!link->stacked_netdevs_created) |
| return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__); |
| |
| if (!link->static_addresses_configured) |
| return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
| |
| SET_FOREACH(a, link->addresses) |
| if (!address_is_ready(a)) |
| return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__, |
| IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen)); |
| |
| if (!link->static_address_labels_configured) |
| return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__); |
| |
| if (!link->static_bridge_fdb_configured) |
| return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); |
| |
| if (!link->static_bridge_mdb_configured) |
| return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); |
| |
| if (!link->static_ipv6_proxy_ndp_configured) |
| return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__); |
| |
| if (!link->static_neighbors_configured) |
| return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); |
| |
| if (!link->static_nexthops_configured) |
| return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); |
| |
| if (!link->static_routes_configured) |
| return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); |
| |
| if (!link->static_routing_policy_rules_configured) |
| return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
| |
| if (!link->sr_iov_configured) |
| return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); |
| |
| /* IPv6LL is assigned after the link gains its carrier. */ |
| if (!link->network->configure_without_carrier && |
| link_ipv6ll_enabled(link) && |
| !in6_addr_is_set(&link->ipv6ll_address)) |
| return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); |
| |
| bool has_dynamic_address = false; |
| SET_FOREACH(a, link->addresses) { |
| if (address_is_marked(a)) |
| continue; |
| if (!address_exists(a)) |
| continue; |
| if (IN_SET(a->source, |
| NETWORK_CONFIG_SOURCE_IPV4LL, |
| NETWORK_CONFIG_SOURCE_DHCP4, |
| NETWORK_CONFIG_SOURCE_DHCP6, |
| NETWORK_CONFIG_SOURCE_DHCP_PD, |
| NETWORK_CONFIG_SOURCE_NDISC)) { |
| has_dynamic_address = true; |
| break; |
| } |
| } |
| |
| if ((link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || |
| (link_dhcp_pd_is_enabled(link) && link->network->dhcp_pd_assign)) && !has_dynamic_address) |
| /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ |
| return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__); |
| |
| /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */ |
| if (link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || |
| link_dhcp6_enabled(link) || link_dhcp_pd_is_enabled(link) || |
| (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link))) { |
| |
| if (!link->ipv4ll_address_configured && !link->dhcp4_configured && |
| !link->dhcp6_configured && !link->dhcp_pd_configured && !link->ndisc_configured) |
| /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */ |
| return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); |
| |
| log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s", |
| __func__, |
| yes_no(link->ipv4ll_address_configured), |
| yes_no(link->dhcp4_configured), |
| yes_no(link->dhcp6_configured), |
| yes_no(link->dhcp_pd_configured), |
| yes_no(link->ndisc_configured)); |
| } |
| |
| link_set_state(link, LINK_STATE_CONFIGURED); |
| } |
| |
| static int link_request_static_configs(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state != _LINK_STATE_INVALID); |
| |
| r = link_request_static_addresses(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_address_labels(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_bridge_fdb(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_bridge_mdb(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_ipv6_proxy_ndp_addresses(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_neighbors(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_nexthops(link, false); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_routes(link, false); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_routing_policy_rules(link); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int link_request_stacked_netdevs(Link *link) { |
| NetDev *netdev; |
| int r; |
| |
| assert(link); |
| |
| link->stacked_netdevs_created = false; |
| |
| HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
| r = link_request_stacked_netdev(link, netdev); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->create_stacked_netdev_messages == 0) { |
| link->stacked_netdevs_created = true; |
| link_check_ready(link); |
| } |
| |
| return 0; |
| } |
| |
| static int link_acquire_dynamic_ipv6_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| r = radv_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m"); |
| |
| r = ndisc_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); |
| |
| r = dhcp6_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); |
| |
| return 0; |
| } |
| |
| static int link_acquire_dynamic_ipv4_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->event); |
| |
| if (link->dhcp_client) { |
| r = dhcp4_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
| |
| log_link_debug(link, "Acquiring DHCPv4 lease."); |
| |
| } else if (link->ipv4ll) { |
| if (in4_addr_is_set(&link->network->ipv4ll_start_address)) { |
| r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m"); |
| } |
| |
| r = sd_ipv4ll_start(link->ipv4ll); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); |
| |
| log_link_debug(link, "Acquiring IPv4 link-local address."); |
| } |
| |
| if (link->dhcp_server) { |
| r = sd_dhcp_server_start(link->dhcp_server); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not start DHCP server: %m"); |
| } |
| |
| r = ipv4acd_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m"); |
| |
| return 0; |
| } |
| |
| static int link_acquire_dynamic_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| r = link_acquire_dynamic_ipv4_conf(link); |
| if (r < 0) |
| return r; |
| |
| if (in6_addr_is_set(&link->ipv6ll_address)) { |
| r = link_acquire_dynamic_ipv6_conf(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) { |
| /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be |
| * configured, and RADV may not be configured yet here. Only acquire subnet prefix when |
| * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the |
| * below will be called in radv_start(). */ |
| r = dhcp_request_prefix_delegation(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m"); |
| } |
| |
| if (link->lldp_tx) { |
| r = sd_lldp_tx_start(link->lldp_tx); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); |
| } |
| |
| if (link->lldp_rx) { |
| r = sd_lldp_rx_start(link->lldp_rx); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start LLDP client: %m"); |
| } |
| |
| return 0; |
| } |
| |
| int link_ipv6ll_gained(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| log_link_info(link, "Gained IPv6LL"); |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| return 0; |
| |
| r = link_acquire_dynamic_ipv6_conf(link); |
| if (r < 0) |
| return r; |
| |
| link_check_ready(link); |
| return 0; |
| } |
| |
| int link_handle_bound_to_list(Link *link) { |
| bool required_up = false; |
| bool link_is_up = false; |
| Link *l; |
| |
| assert(link); |
| |
| /* If at least one interface in bound_to_links has carrier, then make this interface up. |
| * If all interfaces in bound_to_links do not, then make this interface down. */ |
| |
| if (hashmap_isempty(link->bound_to_links)) |
| return 0; |
| |
| if (link->flags & IFF_UP) |
| link_is_up = true; |
| |
| HASHMAP_FOREACH(l, link->bound_to_links) |
| if (link_has_carrier(l)) { |
| required_up = true; |
| break; |
| } |
| |
| if (!required_up && link_is_up) |
| return link_request_to_bring_up_or_down(link, /* up = */ false); |
| if (required_up && !link_is_up) |
| return link_request_to_bring_up_or_down(link, /* up = */ true); |
| |
| return 0; |
| } |
| |
| static int link_handle_bound_by_list(Link *link) { |
| Link *l; |
| int r; |
| |
| assert(link); |
| |
| /* Update up or down state of interfaces which depend on this interface's carrier state. */ |
| |
| if (hashmap_isempty(link->bound_by_links)) |
| return 0; |
| |
| HASHMAP_FOREACH(l, link->bound_by_links) { |
| r = link_handle_bound_to_list(l); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { |
| int r; |
| |
| assert(link); |
| assert(carrier); |
| |
| if (link == carrier) |
| return 0; |
| |
| if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) |
| return 0; |
| |
| r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
| if (r < 0) |
| return r; |
| |
| link_dirty(link); |
| |
| return 0; |
| } |
| |
| static int link_new_bound_by_list(Link *link) { |
| Manager *m; |
| Link *carrier; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| m = link->manager; |
| |
| HASHMAP_FOREACH(carrier, m->links_by_index) { |
| if (!carrier->network) |
| continue; |
| |
| if (strv_isempty(carrier->network->bind_carrier)) |
| continue; |
| |
| if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
| r = link_put_carrier(link, carrier, &link->bound_by_links); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| HASHMAP_FOREACH(carrier, link->bound_by_links) { |
| r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_new_bound_to_list(Link *link) { |
| Manager *m; |
| Link *carrier; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| if (!link->network) |
| return 0; |
| |
| if (strv_isempty(link->network->bind_carrier)) |
| return 0; |
| |
| m = link->manager; |
| |
| HASHMAP_FOREACH(carrier, m->links_by_index) { |
| if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
| r = link_put_carrier(link, carrier, &link->bound_to_links); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| HASHMAP_FOREACH(carrier, link->bound_to_links) { |
| r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static void link_free_bound_to_list(Link *link) { |
| bool updated = false; |
| Link *bound_to; |
| |
| assert(link); |
| |
| while ((bound_to = hashmap_steal_first(link->bound_to_links))) { |
| updated = true; |
| |
| if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) |
| link_dirty(bound_to); |
| } |
| |
| if (updated) |
| link_dirty(link); |
| } |
| |
| static void link_free_bound_by_list(Link *link) { |
| bool updated = false; |
| Link *bound_by; |
| |
| assert(link); |
| |
| while ((bound_by = hashmap_steal_first(link->bound_by_links))) { |
| updated = true; |
| |
| if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { |
| link_dirty(bound_by); |
| link_handle_bound_to_list(bound_by); |
| } |
| } |
| |
| if (updated) |
| link_dirty(link); |
| } |
| |
| static int link_append_to_master(Link *link) { |
| Link *master; |
| int r; |
| |
| assert(link); |
| |
| /* - The link may have no master. |
| * - RTM_NEWLINK message about master interface may not be received yet. */ |
| if (link_get_master(link, &master) < 0) |
| return 0; |
| |
| r = set_ensure_put(&master->slaves, NULL, link); |
| if (r <= 0) |
| return r; |
| |
| link_ref(link); |
| return 0; |
| } |
| |
| static void link_drop_from_master(Link *link) { |
| Link *master; |
| |
| assert(link); |
| |
| if (!link->manager) |
| return; |
| |
| if (link_get_master(link, &master) < 0) |
| return; |
| |
| link_unref(set_remove(master->slaves, link)); |
| } |
| |
| static void link_drop_requests(Link *link) { |
| Request *req; |
| |
| assert(link); |
| assert(link->manager); |
| |
| ORDERED_SET_FOREACH(req, link->manager->request_queue) |
| if (req->link == link) |
| request_detach(link->manager, req); |
| } |
| |
| static Link *link_drop(Link *link) { |
| if (!link) |
| return NULL; |
| |
| assert(link->manager); |
| |
| link_set_state(link, LINK_STATE_LINGER); |
| |
| /* Drop all references from other links and manager. Note that async netlink calls may have |
| * references to the link, and they will be dropped when we receive replies. */ |
| |
| link_drop_requests(link); |
| |
| link_free_bound_to_list(link); |
| link_free_bound_by_list(link); |
| |
| link_clear_sr_iov_ifindices(link); |
| |
| link_drop_from_master(link); |
| |
| if (link->state_file) |
| (void) unlink(link->state_file); |
| |
| link_clean(link); |
| |
| STRV_FOREACH(n, link->alternative_names) |
| hashmap_remove(link->manager->links_by_name, *n); |
| hashmap_remove(link->manager->links_by_name, link->ifname); |
| |
| /* bonding master and its slaves have the same hardware address. */ |
| hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
| |
| /* The following must be called at last. */ |
| assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link); |
| return link_unref(link); |
| } |
| |
| static int link_drop_foreign_config(Link *link) { |
| int k, r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want |
| * to remove loopback address or addresses used for root NFS. */ |
| |
| if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
| return 0; |
| if (FLAGS_SET(link->flags, IFF_LOOPBACK)) |
| return 0; |
| if (link->network->keep_configuration == KEEP_CONFIGURATION_YES) |
| return 0; |
| |
| r = link_drop_foreign_routes(link); |
| |
| k = link_drop_foreign_nexthops(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_foreign_addresses(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_foreign_neighbors(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = manager_drop_foreign_routing_policy_rules(link->manager); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| return r; |
| } |
| |
| static int link_drop_managed_config(Link *link) { |
| int k, r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| r = link_drop_managed_routes(link); |
| |
| k = link_drop_managed_nexthops(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_managed_addresses(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_managed_neighbors(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_managed_routing_policy_rules(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| return r; |
| } |
| |
| static void link_foreignize_config(Link *link) { |
| assert(link); |
| assert(link->manager); |
| |
| link_foreignize_routes(link); |
| link_foreignize_nexthops(link); |
| link_foreignize_addresses(link); |
| link_foreignize_neighbors(link); |
| link_foreignize_routing_policy_rules(link); |
| } |
| |
| static int link_configure(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| assert(link->state == LINK_STATE_INITIALIZED); |
| |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| |
| r = link_new_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_traffic_control(link); |
| if (r < 0) |
| return r; |
| |
| if (link->iftype == ARPHRD_CAN) { |
| /* let's shortcut things for CAN which doesn't need most of what's done below. */ |
| r = link_request_to_set_can(link); |
| if (r < 0) |
| return r; |
| |
| return link_request_to_activate(link); |
| } |
| |
| r = link_request_sr_iov_vfs(link); |
| if (r < 0) |
| return r; |
| |
| r = link_set_sysctl(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_mac(link, /* allow_retry = */ true); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_ipoib(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_flags(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_group(link); |
| if (r < 0) |
| return r; |
| |
| r = link_configure_mtu(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_addrgen_mode(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_master(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_stacked_netdevs(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_bond(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_bridge(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_set_bridge_vlan(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_to_activate(link); |
| if (r < 0) |
| return r; |
| |
| r = ipv4ll_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_dhcp4_client(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_dhcp6_client(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_ndisc(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_dhcp_server(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_radv(link); |
| if (r < 0) |
| return r; |
| |
| r = link_lldp_rx_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_lldp_tx_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_configs(link); |
| if (r < 0) |
| return r; |
| |
| if (!link_has_carrier(link)) |
| return 0; |
| |
| return link_acquire_dynamic_conf(link); |
| } |
| |
| static int link_get_network(Link *link, Network **ret) { |
| Network *network; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(ret); |
| |
| ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { |
| bool warn = false; |
| |
| r = net_match_config( |
| &network->match, |
| link->dev, |
| &link->hw_addr, |
| &link->permanent_hw_addr, |
| link->driver, |
| link->iftype, |
| link->kind, |
| link->ifname, |
| link->alternative_names, |
| link->wlan_iftype, |
| link->ssid, |
| &link->bssid); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| continue; |
| |
| if (network->match.ifname && link->dev) { |
| uint8_t name_assign_type = NET_NAME_UNKNOWN; |
| const char *attr; |
| |
| if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0) |
| (void) safe_atou8(attr, &name_assign_type); |
| |
| warn = name_assign_type == NET_NAME_ENUM; |
| } |
| |
| log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, |
| "found matching network '%s'%s.", |
| network->filename, |
| warn ? ", based on potentially unpredictable interface name" : ""); |
| |
| if (network->unmanaged) |
| return -ENOENT; |
| |
| *ret = network; |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| |
| int link_reconfigure_impl(Link *link, bool force) { |
| Network *network = NULL; |
| NetDev *netdev = NULL; |
| int r; |
| |
| assert(link); |
| |
| if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = netdev_get(link->manager, link->ifname, &netdev); |
| if (r < 0 && r != -ENOENT) |
| return r; |
| |
| r = link_get_network(link, &network); |
| if (r < 0 && r != -ENOENT) |
| return r; |
| |
| if (link->state != LINK_STATE_UNMANAGED && !network) |
| /* If link is in initialized state, then link->network is also NULL. */ |
| force = true; |
| |
| if (link->network == network && !force) |
| return 0; |
| |
| if (network) { |
| if (link->state == LINK_STATE_INITIALIZED) |
| log_link_info(link, "Configuring with %s.", network->filename); |
| else |
| log_link_info(link, "Reconfiguring with %s.", network->filename); |
| } else |
| log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO, |
| "Unmanaging interface."); |
| |
| /* Dropping old .network file */ |
| r = link_stop_engines(link, false); |
| if (r < 0) |
| return r; |
| |
| link_drop_requests(link); |
| |
| if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES) |
| /* When a new/updated .network file is assigned, first make all configs (addresses, |
| * routes, and so on) foreign, and then drop unnecessary configs later by |
| * link_drop_foreign_config() in link_configure(). |
| * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence, |
| * here we need to drop the configs such as addresses, routes, and so on configured by |
| * the previously assigned .network file. */ |
| link_foreignize_config(link); |
| else { |
| /* Remove all managed configs. Note, foreign configs are removed in later by |
| * link_configure() -> link_drop_foreign_config() if the link is managed by us. */ |
| r = link_drop_managed_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the |
| * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will |
| * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the |
| * map here, as it depends on .network files assigned to other links. */ |
| link_free_bound_to_list(link); |
| |
| link_free_engines(link); |
| link->network = network_unref(link->network); |
| |
| netdev_unref(link->netdev); |
| link->netdev = netdev_ref(netdev); |
| |
| if (!network) { |
| link_set_state(link, LINK_STATE_UNMANAGED); |
| return 0; |
| } |
| |
| /* Then, apply new .network file */ |
| link->network = network_ref(network); |
| link_update_operstate(link, true); |
| link_dirty(link); |
| |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| link->activated = false; |
| |
| r = link_configure(link); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) { |
| int r; |
| |
| assert(link); |
| |
| r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state"); |
| if (r <= 0) |
| return r; |
| |
| r = link_reconfigure_impl(link, force); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| return r; |
| } |
| |
| static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
| } |
| |
| static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true); |
| } |
| |
| int link_reconfigure(Link *link, bool force) { |
| int r; |
| |
| assert(link); |
| |
| /* When link in pending or initialized state, then link_configure() will be called. To prevent |
| * the function from being called multiple times simultaneously, refuse to reconfigure the |
| * interface in these cases. */ |
| if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
| return 0; /* 0 means no-op. */ |
| |
| r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler); |
| if (r < 0) |
| return r; |
| |
| return 1; /* 1 means the interface will be reconfigured. */ |
| } |
| |
| static int link_initialized_and_synced(Link *link) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| if (link->manager->test_mode) { |
| log_link_debug(link, "Running in test mode, refusing to enter initialized state."); |
| link_set_state(link, LINK_STATE_UNMANAGED); |
| return 0; |
| } |
| |
| if (link->state == LINK_STATE_PENDING) { |
| log_link_debug(link, "Link state is up-to-date"); |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| |
| r = link_new_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return link_reconfigure_impl(link, /* force = */ false); |
| } |
| |
| static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized"); |
| if (r <= 0) |
| return r; |
| |
| r = link_initialized_and_synced(link); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 0; |
| } |
| |
| static int link_initialized(Link *link, sd_device *device) { |
| int r; |
| |
| assert(link); |
| assert(device); |
| |
| /* Always replace with the new sd_device object. As the sysname (and possibly other properties |
| * or sysattrs) may be outdated. */ |
| device_unref_and_replace(link->dev, device); |
| |
| if (link->dhcp_client) { |
| r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m"); |
| } |
| |
| if (link->dhcp6_client) { |
| r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m"); |
| } |
| |
| r = link_set_sr_iov_ifindices(link); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m"); |
| |
| if (link->state != LINK_STATE_PENDING) |
| return link_reconfigure(link, /* force = */ false); |
| |
| log_link_debug(link, "udev initialized link"); |
| |
| /* udev has initialized the link, but we don't know if we have yet |
| * processed the NEWLINK messages with the latest state. Do a GETLINK, |
| * when it returns we know that the pending NEWLINKs have already been |
| * processed and that we are up-to-date */ |
| |
| return link_call_getlink(link, link_initialized_handler); |
| } |
| |
| static int link_check_initialized(Link *link) { |
| _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
| int r; |
| |
| assert(link); |
| |
| if (!udev_available()) |
| return link_initialized_and_synced(link); |
| |
| /* udev should be around */ |
| r = sd_device_new_from_ifindex(&device, link->ifindex); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); |
| return 0; |
| } |
| |
| r = sd_device_get_is_initialized(device); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); |
| if (r == 0) { |
| /* not yet ready */ |
| log_link_debug(link, "link pending udev initialization..."); |
| return 0; |
| } |
| |
| r = device_is_renaming(device); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); |
| if (r > 0) { |
| log_link_debug(link, "Interface is being renamed, pending initialization."); |
| return 0; |
| } |
| |
| return link_initialized(link, device); |
| } |
| |
| int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) { |
| int r, ifindex; |
| Link *link; |
| |
| assert(m); |
| assert(device); |
| |
| r = sd_device_get_ifindex(device, &ifindex); |
| if (r < 0) |
| return log_device_debug_errno(device, r, "Failed to get ifindex: %m"); |
| |
| r = link_get_by_index(m, ifindex, &link); |
| if (r < 0) { |
| /* This error is not critical, as the corresponding rtnl message may be received later. */ |
| log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); |
| return 0; |
| } |
| |
| /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link |
| * object here. It will be removed only when rtnetlink says so. */ |
| if (action == SD_DEVICE_REMOVE) { |
| link->dev = sd_device_unref(link->dev); |
| return 0; |
| } |
| |
| r = device_is_renaming(device); |
| if (r < 0) |
| return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m"); |
| if (r > 0) { |
| log_device_debug(device, "Device is renaming, waiting for the interface to be renamed."); |
| /* TODO: |
| * What happens when a device is initialized, then soon renamed after that? When we detect |
| * such, maybe we should cancel or postpone all queued requests for the interface. */ |
| return 0; |
| } |
| |
| r = link_initialized(link, device); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 0; |
| } |
| |
| static int link_carrier_gained(Link *link) { |
| bool force_reconfigure; |
| int r; |
| |
| assert(link); |
| |
| r = event_source_disable(link->carrier_lost_timer); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m"); |
| |
| /* If a wireless interface was connected to an access point, and the SSID is changed (that is, |
| * both previous_ssid and ssid are non-NULL), then the connected wireless network could be |
| * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be |
| * restarted, and the correct network information will be gained. |
| * |
| * However, do not reconfigure the wireless interface forcibly if it was not connected to any |
| * access points previously (previous_ssid is NULL in this case). As, a .network file may be |
| * already assigned to the interface (in that case, the .network file does not have the SSID= |
| * setting in the [Match] section), and the interface is already being configured. Of course, |
| * there may exist another .network file with higher priority and a matching SSID= setting. But |
| * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag. |
| * |
| * For non-wireless interfaces, we have no way to detect the connected network change. So, |
| * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */ |
| force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid); |
| link->previous_ssid = mfree(link->previous_ssid); |
| |
| /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network |
| * profile wants to match on it with SSID= in its [Match] section. |
| */ |
| if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) { |
| r = link_get_wlan_interface(link); |
| if (r < 0) |
| return r; |
| } |
| |
| /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to |
| * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call |
| * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */ |
| r = link_reconfigure_impl(link, force_reconfigure); |
| if (r != 0) |
| return r; |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| if (link->iftype == ARPHRD_CAN) |
| /* let's shortcut things for CAN which doesn't need most of what's done below. */ |
| return 0; |
| |
| if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
| r = link_acquire_dynamic_conf(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_static_configs(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_carrier_lost_impl(Link *link) { |
| int r, ret = 0; |
| |
| assert(link); |
| |
| link->previous_ssid = mfree(link->previous_ssid); |
| |
| if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| r = link_stop_engines(link, false); |
| if (r < 0) |
| ret = r; |
| |
| r = link_drop_managed_config(link); |
| if (r < 0 && ret >= 0) |
| ret = r; |
| |
| return ret; |
| } |
| |
| static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) { |
| Link *link = ASSERT_PTR(userdata); |
| int r; |
| |
| r = link_carrier_lost_impl(link); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to process carrier lost event: %m"); |
| link_enter_failed(link); |
| } |
| |
| return 0; |
| } |
| |
| static int link_carrier_lost(Link *link) { |
| uint16_t dhcp_mtu; |
| usec_t usec; |
| int r; |
| |
| assert(link); |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| if (link->iftype == ARPHRD_CAN) |
| /* let's shortcut things for CAN which doesn't need most of what's done below. */ |
| return 0; |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->network->ignore_carrier_loss_set) |
| /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */ |
| usec = link->network->ignore_carrier_loss_usec; |
| |
| else if (link->network->bond && link->wlan_iftype > 0) |
| /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its |
| * carrier to be lost. See #19832. */ |
| usec = 3 * USEC_PER_SEC; |
| |
| else if (link->network->dhcp_use_mtu && |
| link->dhcp_lease && |
| sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 && |
| dhcp_mtu != link->original_mtu) |
| /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static |
| * MTU should not cause any issues, as MTU is changed only once. However, setting MTU |
| * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */ |
| usec = 5 * USEC_PER_SEC; |
| |
| else |
| /* Otherwise, use the currently set value. */ |
| usec = link->network->ignore_carrier_loss_usec; |
| |
| if (usec == USEC_INFINITY) |
| return 0; |
| |
| if (usec == 0) |
| return link_carrier_lost_impl(link); |
| |
| return event_reset_time_relative(link->manager->event, |
| &link->carrier_lost_timer, |
| CLOCK_BOOTTIME, |
| usec, |
| 0, |
| link_carrier_lost_handler, |
| link, |
| 0, |
| "link-carrier-loss", |
| true); |
| } |
| |
| static int link_admin_state_up(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| /* This is called every time an interface admin state changes to up; |
| * specifically, when IFF_UP flag changes from unset to set. */ |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { |
| log_link_info(link, "Activation policy is \"always-down\", forcing link down."); |
| return link_request_to_bring_up_or_down(link, /* up = */ false); |
| } |
| |
| /* We set the ipv6 mtu after the device mtu, but the kernel resets |
| * ipv6 mtu on NETDEV_UP, so we need to reset it. */ |
| r = link_set_ipv6_mtu(link); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m"); |
| |
| return 0; |
| } |
| |
| static int link_admin_state_down(Link *link) { |
| assert(link); |
| |
| if (!link->network) |
| return 0; |
| |
| if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { |
| log_link_info(link, "Activation policy is \"always-up\", forcing link up."); |
| return link_request_to_bring_up_or_down(link, /* up = */ true); |
| } |
| |
| return 0; |
| } |
| |
| static bool link_is_enslaved(Link *link) { |
| if (link->flags & IFF_SLAVE) |
| return true; |
| |
| if (link->master_ifindex > 0) |
| return true; |
| |
| return false; |
| } |
| |
| static LinkAddressState address_state_from_scope(uint8_t scope) { |
| if (scope < RT_SCOPE_SITE) |
| /* universally accessible addresses found */ |
| return LINK_ADDRESS_STATE_ROUTABLE; |
| |
| if (scope < RT_SCOPE_HOST) |
| /* only link or site local addresses found */ |
| return LINK_ADDRESS_STATE_DEGRADED; |
| |
| /* no useful addresses found */ |
| return LINK_ADDRESS_STATE_OFF; |
| } |
| |
| void link_update_operstate(Link *link, bool also_update_master) { |
| LinkOperationalState operstate; |
| LinkCarrierState carrier_state; |
| LinkAddressState ipv4_address_state, ipv6_address_state, address_state; |
| LinkOnlineState online_state; |
| _cleanup_strv_free_ char **p = NULL; |
| uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE; |
| bool changed = false; |
| Address *address; |
| |
| assert(link); |
| |
| if (link->kernel_operstate == IF_OPER_DORMANT) |
| carrier_state = LINK_CARRIER_STATE_DORMANT; |
| else if (link_has_carrier(link)) { |
| if (link_is_enslaved(link)) |
| carrier_state = LINK_CARRIER_STATE_ENSLAVED; |
| else |
| carrier_state = LINK_CARRIER_STATE_CARRIER; |
| } else if (link->flags & IFF_UP) |
| carrier_state = LINK_CARRIER_STATE_NO_CARRIER; |
| else |
| carrier_state = LINK_CARRIER_STATE_OFF; |
| |
| if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { |
| Link *slave; |
| |
| SET_FOREACH(slave, link->slaves) { |
| link_update_operstate(slave, false); |
| |
| if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) |
| carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; |
| } |
| } |
| |
| SET_FOREACH(address, link->addresses) { |
| if (!address_is_ready(address)) |
| continue; |
| |
| if (address->family == AF_INET) |
| ipv4_scope = MIN(ipv4_scope, address->scope); |
| |
| if (address->family == AF_INET6) |
| ipv6_scope = MIN(ipv6_scope, address->scope); |
| } |
| |
| ipv4_address_state = address_state_from_scope(ipv4_scope); |
| ipv6_address_state = address_state_from_scope(ipv6_scope); |
| address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope)); |
| |
| /* Mapping of address and carrier state vs operational state |
| * carrier state |
| * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved |
| * ------------------------------------------------------------------------------ |
| * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved |
| * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved |
| * routable | off | no-carrier | dormant | degraded-carrier | routable | routable |
| */ |
| |
| if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) |
| operstate = (LinkOperationalState) carrier_state; |
| else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) |
| operstate = LINK_OPERSTATE_ROUTABLE; |
| else if (carrier_state == LINK_CARRIER_STATE_CARRIER) |
| operstate = LINK_OPERSTATE_DEGRADED; |
| else |
| operstate = LINK_OPERSTATE_ENSLAVED; |
| |
| /* Only determine online state for managed links with RequiredForOnline=yes */ |
| if (!link->network || !link->network->required_for_online) |
| online_state = _LINK_ONLINE_STATE_INVALID; |
| else if (operstate < link->network->required_operstate_for_online.min || |
| operstate > link->network->required_operstate_for_online.max) |
| online_state = LINK_ONLINE_STATE_OFFLINE; |
| else { |
| AddressFamily required_family = link->network->required_family_for_online; |
| bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; |
| bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; |
| |
| /* The operational state is within the range required for online. |
| * If a particular address family is also required, we might revert |
| * to offline in the blocks below. */ |
| online_state = LINK_ONLINE_STATE_ONLINE; |
| |
| if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { |
| if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) |
| online_state = LINK_ONLINE_STATE_OFFLINE; |
| if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) |
| online_state = LINK_ONLINE_STATE_OFFLINE; |
| } |
| |
| if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { |
| if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) |
| online_state = LINK_ONLINE_STATE_OFFLINE; |
| if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) |
| online_state = LINK_ONLINE_STATE_OFFLINE; |
| } |
| } |
| |
| if (link->carrier_state != carrier_state) { |
| link->carrier_state = carrier_state; |
| changed = true; |
| if (strv_extend(&p, "CarrierState") < 0) |
| log_oom(); |
| } |
| |
| if (link->address_state != address_state) { |
| link->address_state = address_state; |
| changed = true; |
| if (strv_extend(&p, "AddressState") < 0) |
| log_oom(); |
| } |
| |
| if (link->ipv4_address_state != ipv4_address_state) { |
| link->ipv4_address_state = ipv4_address_state; |
| changed = true; |
| if (strv_extend(&p, "IPv4AddressState") < 0) |
| log_oom(); |
| } |
| |
| if (link->ipv6_address_state != ipv6_address_state) { |
| link->ipv6_address_state = ipv6_address_state; |
| changed = true; |
| if (strv_extend(&p, "IPv6AddressState") < 0) |
| log_oom(); |
| } |
| |
| if (link->operstate != operstate) { |
| link->operstate = operstate; |
| changed = true; |
| if (strv_extend(&p, "OperationalState") < 0) |
| log_oom(); |
| } |
| |
| if (link->online_state != online_state) { |
| link->online_state = online_state; |
| changed = true; |
| if (strv_extend(&p, "OnlineState") < 0) |
| log_oom(); |
| } |
| |
| if (p) |
| link_send_changed_strv(link, p); |
| if (changed) |
| link_dirty(link); |
| |
| if (also_update_master) { |
| Link *master; |
| |
| if (link_get_master(link, &master) >= 0) |
| link_update_operstate(master, true); |
| } |
| } |
| |
| #define FLAG_STRING(string, flag, old, new) \ |
| (((old ^ new) & flag) \ |
| ? ((old & flag) ? (" -" string) : (" +" string)) \ |
| : "") |
| |
| static int link_update_flags(Link *link, sd_netlink_message *message) { |
| bool link_was_admin_up, had_carrier; |
| uint8_t operstate; |
| unsigned flags; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_rtnl_message_link_get_flags(message, &flags); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m"); |
| |
| r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate); |
| if (r == -ENODATA) |
| /* If we got a message without operstate, assume the state was unchanged. */ |
| operstate = link->kernel_operstate; |
| else if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m"); |
| |
| if (link->flags == flags && link->kernel_operstate == operstate) |
| return 0; |
| |
| if (link->flags != flags) { |
| unsigned unknown_flags, unknown_flags_added, unknown_flags_removed; |
| |
| log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
| FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), |
| FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), |
| FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), |
| FLAG_STRING("UP", IFF_UP, link->flags, flags), |
| FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), |
| FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), |
| FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), |
| FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), |
| FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), |
| FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), |
| FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), |
| FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), |
| FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), |
| FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), |
| FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), |
| FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), |
| FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), |
| FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), |
| FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); |
| |
| unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
| IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | |
| IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | |
| IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | |
| IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | |
| IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); |
| unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); |
| unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); |
| |
| if (unknown_flags_added) |
| log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added); |
| |
| if (unknown_flags_removed) |
| log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed); |
| } |
| |
| link_was_admin_up = link->flags & IFF_UP; |
| had_carrier = link_has_carrier(link); |
| |
| link->flags = flags; |
| link->kernel_operstate = operstate; |
| |
| link_update_operstate(link, true); |
| |
| if (!link_was_admin_up && (link->flags & IFF_UP)) { |
| log_link_info(link, "Link UP"); |
| |
| r = link_admin_state_up(link); |
| if (r < 0) |
| return r; |
| } else if (link_was_admin_up && !(link->flags & IFF_UP)) { |
| log_link_info(link, "Link DOWN"); |
| |
| r = link_admin_state_down(link); |
| if (r < 0) |
| return r; |
| } |
| |
| if (!had_carrier && link_has_carrier(link)) { |
| log_link_info(link, "Gained carrier"); |
| |
| r = link_carrier_gained(link); |
| if (r < 0) |
| return r; |
| } else if (had_carrier && !link_has_carrier(link)) { |
| log_link_info(link, "Lost carrier"); |
| |
| r = link_carrier_lost(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int link_update_master(Link *link, sd_netlink_message *message) { |
| int master_ifindex, r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex); |
| if (r == -ENODATA) |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m"); |
| |
| if (master_ifindex == link->ifindex) |
| master_ifindex = 0; |
| |
| if (master_ifindex == link->master_ifindex) |
| return 0; |
| |
| if (link->master_ifindex == 0) |
| log_link_debug(link, "Attached to master interface: %i", master_ifindex); |
| else if (master_ifindex == 0) |
| log_link_debug(link, "Detached from master interface: %i", link->master_ifindex); |
| else |
| log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex, |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex); |
| |
| link_drop_from_master(link); |
| |
| link->master_ifindex = master_ifindex; |
| |
| r = link_append_to_master(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to append link to master: %m"); |
| |
| return 0; |
| } |
| |
| static int link_update_driver(Link *link, sd_netlink_message *message) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(message); |
| |
| /* Driver is already read. Assuming the driver is never changed. */ |
| if (link->ethtool_driver_read) |
| return 0; |
| |
| /* When udevd is running, read the driver after the interface is initialized by udevd. |
| * Otherwise, ethtool may not work correctly. See issue #22538. |
| * When udevd is not running, read the value when the interface is detected. */ |
| if (udev_available() && !link->dev) |
| return 0; |
| |
| link->ethtool_driver_read = true; |
| |
| r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); |
| return 0; |
| } |
| |
| log_link_debug(link, "Found driver: %s", strna(link->driver)); |
| |
| if (streq_ptr(link->driver, "dsa")) { |
| uint32_t dsa_master_ifindex = 0; |
| |
| r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex); |
| if (r < 0 && r != -ENODATA) |
| return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m"); |
| |
| if (dsa_master_ifindex > INT_MAX) { |
| log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.", |
| dsa_master_ifindex); |
| dsa_master_ifindex = 0; |
| } |
| |
| link->dsa_master_ifindex = (int) dsa_master_ifindex; |
| } |
| |
| return 1; /* needs reconfigure */ |
| } |
| |
| static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(message); |
| |
| if (link->ethtool_permanent_hw_addr_read) |
| return 0; |
| |
| /* When udevd is running, read the permanent hardware address after the interface is |
| * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538. |
| * When udevd is not running, read the value when the interface is detected. */ |
| if (udev_available() && !link->dev) |
| return 0; |
| |
| /* If the interface does not have a hardware address, then it will not have a permanent address either. */ |
| r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL); |
| if (r == -ENODATA) |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m"); |
| |
| link->ethtool_permanent_hw_addr_read = true; |
| |
| r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr); |
| if (r < 0) |
| log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m"); |
| |
| return 0; |
| } |
| |
| static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) { |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(message); |
| |
| if (link->permanent_hw_addr.length > 0) |
| return 0; |
| |
| r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr); |
| if (r < 0) { |
| if (r != -ENODATA) |
| return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m"); |
| |
| /* Fallback to ethtool for older kernels. */ |
| r = link_update_permanent_hardware_address_from_ethtool(link, message); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->permanent_hw_addr.length > 0) |
| log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr)); |
| |
| return 1; /* needs reconfigure */ |
| } |
| |
| static int link_update_hardware_address(Link *link, sd_netlink_message *message) { |
| struct hw_addr_data addr; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); |
| if (r < 0 && r != -ENODATA) |
| return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m"); |
| |
| r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr); |
| if (r == -ENODATA) |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m"); |
| |
| if (hw_addr_equal(&link->hw_addr, &addr)) |
| return 0; |
| |
| if (link->hw_addr.length == 0) |
| log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr)); |
| else { |
| log_link_debug(link, "Hardware address is changed: %s %s %s", |
| HW_ADDR_TO_STR(&link->hw_addr), |
| special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), |
| HW_ADDR_TO_STR(&addr)); |
| |
| hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
| } |
| |
| link->hw_addr = addr; |
| |
| if (!hw_addr_is_null(&link->hw_addr)) { |
| r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link); |
| if (r == -EEXIST && streq_ptr(link->kind, "bond")) |
| /* bonding master and its slaves have the same hardware address. */ |
| r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link); |
| if (r < 0) |
| log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m"); |
| } |
| |
| r = ipv4acd_update_mac(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); |
| |
| r = ipv4ll_update_mac(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
| |
| r = dhcp4_update_mac(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m"); |
| |
| r = dhcp6_update_mac(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); |
| |
| r = radv_update_mac(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); |
| |
| if (link->ndisc && link->hw_addr.length == ETH_ALEN) { |
| r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m"); |
| } |
| |
| if (link->lldp_rx) { |
| r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m"); |
| } |
| |
| if (link->lldp_tx) { |
| r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m"); |
| } |
| |
| return 1; /* needs reconfigure */ |
| } |
| |
| static int link_update_mtu(Link *link, sd_netlink_message *message) { |
| uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu); |
| if (r == -ENODATA) |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m"); |
| if (mtu == 0) |
| return 0; |
| |
| r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu); |
| if (r < 0 && r != -ENODATA) |
| return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m"); |
| |
| r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu); |
| if (r < 0 && r != -ENODATA) |
| return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m"); |
| |
| if (max_mtu == 0) |
| max_mtu = UINT32_MAX; |
| |
| link->min_mtu = min_mtu; |
| link->max_mtu = max_mtu; |
| |
| if (link->original_mtu == 0) { |
| link->original_mtu = mtu; |
| log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
| link->original_mtu, link->min_mtu, link->max_mtu); |
| } |
| |
| if (link->mtu == mtu) |
| return 0; |
| |
| if (link->mtu != 0) |
| log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
| link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu, |
| link->min_mtu, link->max_mtu); |
| |
| link->mtu = mtu; |
| |
| if (link->dhcp_client) { |
| r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m"); |
| } |
| |
| if (link->radv) { |
| r = sd_radv_set_mtu(link->radv, link->mtu); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
| _cleanup_strv_free_ char **altnames = NULL; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); |
| if (r == -ENODATA) |
| /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the |
| * interface has no alternative name. */ |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); |
| |
| if (strv_equal(altnames, link->alternative_names)) |
| return 0; |
| |
| STRV_FOREACH(n, link->alternative_names) |
| hashmap_remove(link->manager->links_by_name, *n); |
| |
| strv_free_and_replace(link->alternative_names, altnames); |
| |
| STRV_FOREACH(n, link->alternative_names) { |
| r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m"); |
| } |
| |
| return 1; /* needs reconfigure */ |
| } |
| |
| static int link_update_name(Link *link, sd_netlink_message *message) { |
| char ifname_from_index[IF_NAMESIZE]; |
| const char *ifname; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); |
| if (r == -ENODATA) |
| /* Hmm?? But ok. */ |
| return 0; |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m"); |
| |
| if (streq(ifname, link->ifname)) |
| return 0; |
| |
| r = format_ifname(link->ifindex, ifname_from_index); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex); |
| |
| if (!streq(ifname, ifname_from_index)) { |
| log_link_debug(link, "New interface name '%s' received from the kernel does not correspond " |
| "with the name currently configured on the actual interface '%s'. Ignoring.", |
| ifname, ifname_from_index); |
| return 0; |
| } |
| |
| log_link_info(link, "Interface name change detected, renamed to %s.", ifname); |
| |
| hashmap_remove(link->manager->links_by_name, link->ifname); |
| |
| r = free_and_strdup(&link->ifname, ifname); |
| if (r < 0) |
| return log_oom_debug(); |
| |
| r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m"); |
| |
| if (link->dhcp_client) { |
| r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m"); |
| } |
| |
| if (link->dhcp6_client) { |
| r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m"); |
| } |
| |
| if (link->ndisc) { |
| r = sd_ndisc_set_ifname(link->ndisc, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m"); |
| } |
| |
| if (link->dhcp_server) { |
| r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m"); |
| } |
| |
| if (link->radv) { |
| r = sd_radv_set_ifname(link->radv, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m"); |
| } |
| |
| if (link->lldp_rx) { |
| r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m"); |
| } |
| |
| if (link->lldp_tx) { |
| r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m"); |
| } |
| |
| if (link->ipv4ll) { |
| r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m"); |
| } |
| |
| r = ipv4acd_set_ifname(link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m"); |
| |
| return 1; /* needs reconfigure */ |
| } |
| |
| static int link_update(Link *link, sd_netlink_message *message) { |
| bool needs_reconfigure = false; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = link_update_name(link, message); |
| if (r < 0) |
| return r; |
| needs_reconfigure = needs_reconfigure || r > 0; |
| |
| r = link_update_alternative_names(link, message); |
| if (r < 0) |
| return r; |
| needs_reconfigure = needs_reconfigure || r > 0; |
| |
| r = link_update_mtu(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_driver(link, message); |
| if (r < 0) |
| return r; |
| needs_reconfigure = needs_reconfigure || r > 0; |
| |
| r = link_update_permanent_hardware_address(link, message); |
| if (r < 0) |
| return r; |
| needs_reconfigure = needs_reconfigure || r > 0; |
| |
| r = link_update_hardware_address(link, message); |
| if (r < 0) |
| return r; |
| needs_reconfigure = needs_reconfigure || r > 0; |
| |
| r = link_update_master(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_ipv6ll_addrgen_mode(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_flags(link, message); |
| if (r < 0) |
| return r; |
| |
| return needs_reconfigure; |
| } |
| |
| static Link *link_drop_or_unref(Link *link) { |
| if (!link) |
| return NULL; |
| if (!link->manager) |
| return link_unref(link); |
| return link_drop(link); |
| } |
| |
| DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); |
| |
| static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { |
| _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL; |
| _cleanup_(link_drop_or_unrefp) Link *link = NULL; |
| unsigned short iftype; |
| int r, ifindex; |
| |
| assert(manager); |
| assert(message); |
| assert(ret); |
| |
| r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
| if (r < 0) |
| return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m"); |
| else if (ifindex <= 0) |
| return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex."); |
| |
| r = sd_rtnl_message_link_get_type(message, &iftype); |
| if (r < 0) |
| return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m"); |
| |
| r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); |
| if (r < 0) |
| return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m"); |
| |
| /* check for link kind */ |
| r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); |
| if (r >= 0) { |
| r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); |
| if (r < 0 && r != -ENODATA) |
| return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m"); |
| r = sd_netlink_message_exit_container(message); |
| if (r < 0) |
| return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m"); |
| } |
| |
| if (!manager->test_mode) { |
| /* Do not update state files when running in test mode. */ |
| if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0) |
| return log_oom_debug(); |
| |
| if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0) |
| return log_oom_debug(); |
| |
| if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0) |
| return log_oom_debug(); |
| } |
| |
| link = new(Link, 1); |
| if (!link) |
| return -ENOMEM; |
| |
| *link = (Link) { |
| .n_ref = 1, |
| .state = LINK_STATE_PENDING, |
| .online_state = _LINK_ONLINE_STATE_INVALID, |
| .ifindex = ifindex, |
| .iftype = iftype, |
| .ifname = TAKE_PTR(ifname), |
| .kind = TAKE_PTR(kind), |
| |
| .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID, |
| |
| .state_file = TAKE_PTR(state_file), |
| .lease_file = TAKE_PTR(lease_file), |
| .lldp_file = TAKE_PTR(lldp_file), |
| |
| .n_dns = UINT_MAX, |
| .dns_default_route = -1, |
| .llmnr = _RESOLVE_SUPPORT_INVALID, |
| .mdns = _RESOLVE_SUPPORT_INVALID, |
| .dnssec_mode = _DNSSEC_MODE_INVALID, |
| .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, |
| }; |
| |
| r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to store link into manager: %m"); |
| |
| link->manager = manager; |
| |
| r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m"); |
| |
| log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s", |
| link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind)); |
| |
| /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE |
| * message arrived too early. Request the wireless link information again. |
| */ |
| if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) { |
| r = link_get_wlan_interface(link); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m"); |
| } |
| |
| *ret = TAKE_PTR(link); |
| return 0; |
| } |
| |
| int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) { |
| Link *link = NULL; |
| NetDev *netdev = NULL; |
| uint16_t type; |
| const char *name; |
| int r, ifindex; |
| |
| assert(rtnl); |
| assert(message); |
| assert(manager); |
| |
| if (sd_netlink_message_is_error(message)) { |
| r = sd_netlink_message_get_errno(message); |
| if (r < 0) |
| log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); |
| |
| return 0; |
| } |
| |
| r = sd_netlink_message_get_type(message, &type); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); |
| return 0; |
| } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { |
| log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); |
| return 0; |
| } else if (ifindex <= 0) { |
| log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); |
| return 0; |
| } |
| |
| (void) link_get_by_index(manager, ifindex, &link); |
| (void) netdev_get(manager, name, &netdev); |
| |
| switch (type) { |
| case RTM_NEWLINK: |
| if (netdev) { |
| /* netdev exists, so make sure the ifindex matches */ |
| r = netdev_set_ifindex(netdev, message); |
| if (r < 0) { |
| log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m"); |
| return 0; |
| } |
| } |
| |
| if (!link) { |
| /* link is new, so add it */ |
| r = link_new(manager, message, &link); |
| if (r < 0) { |
| log_warning_errno(r, "Could not process new link message: %m"); |
| return 0; |
| } |
| |
| r = link_update(link, message); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not process link message: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| r = link_check_initialized(link); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to check link is initialized: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| } else { |
| r = link_update(link, message); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not process link message: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| if (r > 0) { |
| r = link_reconfigure_impl(link, /* force = */ false); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to reconfigure interface: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| } |
| } |
| break; |
| |
| case RTM_DELLINK: |
| link_drop(link); |
| netdev_drop(netdev); |
| break; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| return 1; |
| } |
| |
| int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
| uint16_t message_type; |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(error_msg); |
| |
| 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, error_msg); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| r = sd_netlink_message_get_type(m, &message_type); |
| if (r < 0) { |
| log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m"); |
| return 0; |
| } |
| if (message_type != RTM_NEWLINK) { |
| log_link_debug(link, "rtnl: received invalid link message type, ignoring."); |
| return 0; |
| } |
| |
| r = link_update(link, m); |
| if (r < 0) { |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| int link_call_getlink(Link *link, link_netlink_message_handler_t callback) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| assert(callback); |
| |
| r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex); |
| if (r < 0) |
| return r; |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, callback, |
| link_netlink_destroy_callback, link); |
| if (r < 0) |
| return r; |
| |
| link_ref(link); |
| return 0; |
| } |
| |
| static const char* const link_state_table[_LINK_STATE_MAX] = { |
| [LINK_STATE_PENDING] = "pending", |
| [LINK_STATE_INITIALIZED] = "initialized", |
| [LINK_STATE_CONFIGURING] = "configuring", |
| [LINK_STATE_CONFIGURED] = "configured", |
| [LINK_STATE_UNMANAGED] = "unmanaged", |
| [LINK_STATE_FAILED] = "failed", |
| [LINK_STATE_LINGER] = "linger", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |
| |
| int link_flags_to_string_alloc(uint32_t flags, char **ret) { |
| _cleanup_free_ char *str = NULL; |
| static const char* map[] = { |
| [LOG2U(IFF_UP)] = "up", /* interface is up. */ |
| [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */ |
| [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */ |
| [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */ |
| [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */ |
| [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */ |
| [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */ |
| [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */ |
| [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */ |
| [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */ |
| [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */ |
| [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */ |
| [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */ |
| [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */ |
| [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */ |
| [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */ |
| [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */ |
| [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */ |
| [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */ |
| }; |
| |
| assert(ret); |
| |
| for (size_t i = 0; i < ELEMENTSOF(map); i++) |
| if (FLAGS_SET(flags, 1 << i) && map[i]) |
| if (!strextend_with_separator(&str, ",", map[i])) |
| return -ENOMEM; |
| |
| *ret = TAKE_PTR(str); |
| return 0; |
| } |
| |
| static const char * const kernel_operstate_table[] = { |
| [IF_OPER_UNKNOWN] = "unknown", |
| [IF_OPER_NOTPRESENT] = "not-present", |
| [IF_OPER_DOWN] = "down", |
| [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down", |
| [IF_OPER_TESTING] = "testing", |
| [IF_OPER_DORMANT] = "dormant", |
| [IF_OPER_UP] = "up", |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int); |