| /* 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 "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 "fd-util.h" |
| #include "fileio.h" |
| #include "format-util.h" |
| #include "fs-util.h" |
| #include "ipvlan.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-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-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 "stat-util.h" |
| #include "stdio-util.h" |
| #include "string-table.h" |
| #include "strv.h" |
| #include "tc.h" |
| #include "tmpfile-util.h" |
| #include "udev-util.h" |
| #include "util.h" |
| #include "vrf.h" |
| |
| bool link_ipv4ll_enabled(Link *link) { |
| assert(link); |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| if (link->hw_addr.length != ETH_ALEN) |
| return false; |
| |
| if (ether_addr_is_null(&link->hw_addr.ether)) |
| return false; |
| |
| if (STRPTR_IN_SET(link->kind, |
| "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti", |
| "vti6", "nlmon", "xfrm", "bareudp")) |
| return false; |
| |
| /* L3 or L3S mode do not support ARP. */ |
| if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| return link->network->link_local & ADDRESS_FAMILY_IPV4; |
| } |
| |
| bool link_ipv6ll_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->flags & IFF_LOOPBACK) |
| return false; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| return link->network->link_local & ADDRESS_FAMILY_IPV6; |
| } |
| |
| bool link_ipv6_enabled(Link *link) { |
| assert(link); |
| |
| if (!socket_ipv6_is_supported()) |
| return false; |
| |
| if (link->network->bond) |
| return false; |
| |
| if (link->iftype == ARPHRD_CAN) |
| return false; |
| |
| /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ |
| if (link_ipv6ll_enabled(link)) |
| return true; |
| |
| if (network_has_static_ipv6_configurations(link->network)) |
| return true; |
| |
| return false; |
| } |
| |
| bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
| assert(link); |
| |
| if (!link->network) { |
| if (!allow_unmanaged) |
| return false; |
| |
| return link_has_carrier(link); |
| } |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| return false; |
| |
| 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->stacked_netdevs_created) |
| return false; |
| |
| if (!link->activated) |
| return false; |
| |
| return true; |
| } |
| |
| 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->lldp = sd_lldp_unref(link->lldp); |
| link_lldp_emit_stop(link); |
| |
| ndisc_flush(link); |
| |
| 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->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->routes_foreign = set_free(link->routes_foreign); |
| link->dhcp_routes = set_free(link->dhcp_routes); |
| link->dhcp_routes_old = set_free(link->dhcp_routes_old); |
| link->dhcp6_routes = set_free(link->dhcp6_routes); |
| link->dhcp6_routes_old = set_free(link->dhcp6_routes_old); |
| link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes); |
| link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old); |
| link->ndisc_routes = set_free(link->ndisc_routes); |
| |
| link->nexthops = set_free(link->nexthops); |
| link->nexthops_foreign = set_free(link->nexthops_foreign); |
| |
| link->neighbors = set_free(link->neighbors); |
| link->neighbors_foreign = set_free(link->neighbors_foreign); |
| |
| link->addresses = set_free(link->addresses); |
| link->addresses_foreign = set_free(link->addresses_foreign); |
| link->addresses_ipv4acd = set_free(link->addresses_ipv4acd); |
| link->pool_addresses = set_free(link->pool_addresses); |
| link->static_addresses = set_free(link->static_addresses); |
| link->dhcp6_addresses = set_free(link->dhcp6_addresses); |
| link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old); |
| link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses); |
| link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old); |
| link->ndisc_addresses = set_free(link->ndisc_addresses); |
| |
| link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes); |
| |
| link_free_engines(link); |
| |
| free(link->ifname); |
| strv_free(link->alternative_names); |
| free(link->kind); |
| free(link->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->sd_device); |
| |
| hashmap_free(link->bound_to_links); |
| hashmap_free(link->bound_by_links); |
| |
| set_free_with_destructor(link->slaves, link_unref); |
| |
| network_unref(link->network); |
| |
| 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_stop(link->lldp); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop LLDP: %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 = dhcp6_pd_remove(link); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); |
| |
| k = sd_ndisc_stop(link->ndisc); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); |
| |
| k = sd_radv_stop(link->radv); |
| if (k < 0) |
| r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); |
| |
| link_lldp_emit_stop(link); |
| 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->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)) { |
| _cleanup_free_ char *str = NULL; |
| |
| (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str); |
| return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str)); |
| } |
| |
| 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_ndisc_address = false; |
| NDiscAddress *n; |
| SET_FOREACH(n, link->ndisc_addresses) |
| if (!n->marked) { |
| has_ndisc_address = true; |
| break; |
| } |
| |
| if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) && |
| !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address && |
| !link->ipv4ll_address_configured) |
| /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ |
| return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 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_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || |
| (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link)) || |
| link_ipv4ll_enabled(link)) { |
| |
| if (!link->dhcp4_configured && |
| !(link->dhcp6_address_configured && link->dhcp6_route_configured) && |
| !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) && |
| !(link->ndisc_addresses_configured && link->ndisc_routes_configured) && |
| !link->ipv4ll_address_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(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp6_routes:%s " |
| "dhcp6_pd_addresses:%s dhcp6_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s", |
| __func__, |
| yes_no(link->dhcp4_configured), |
| yes_no(link->ipv4ll_address_configured), |
| yes_no(link->dhcp6_address_configured), |
| yes_no(link->dhcp6_route_configured), |
| yes_no(link->dhcp6_pd_address_configured), |
| yes_no(link->dhcp6_pd_route_configured), |
| yes_no(link->ndisc_addresses_configured), |
| yes_no(link->ndisc_routes_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; |
| link->stacked_netdevs_after_configured_created = false; |
| |
| HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
| r = link_request_to_crate_stacked_netdev(link, netdev); |
| if (r < 0) |
| return r; |
| } |
| |
| if (link->create_stacked_netdev_messages == 0) |
| link->stacked_netdevs_created = true; |
| if (link->create_stacked_netdev_after_configured_messages == 0) |
| link->stacked_netdevs_after_configured_created = true; |
| |
| return 0; |
| } |
| |
| static int link_acquire_dynamic_ipv6_conf(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (link->radv) { |
| assert(link->radv); |
| assert(in6_addr_is_link_local(&link->ipv6ll_address)); |
| |
| log_link_debug(link, "Starting IPv6 Router Advertisements"); |
| |
| r = radv_emit_dns(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m"); |
| |
| r = sd_radv_start(link->radv); |
| if (r < 0 && r != -EBUSY) |
| return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %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"); |
| |
| r = dhcp6_request_prefix_delegation(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %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"); |
| |
| } else if (link->ipv4ll) { |
| log_link_debug(link, "Acquiring IPv4 link-local address"); |
| |
| r = sd_ipv4ll_start(link->ipv4ll); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); |
| } |
| |
| 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); |
| |
| 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; |
| } |
| |
| r = link_lldp_emit_start(link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); |
| |
| return 0; |
| } |
| |
| int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { |
| int r; |
| |
| assert(link); |
| |
| log_link_info(link, "Gained IPv6LL"); |
| |
| link->ipv6ll_address = *address; |
| link_check_ready(link); |
| |
| if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
| r = link_acquire_dynamic_ipv6_conf(link); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| } |
| |
| 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 int link_new_carrier_maps(Link *link) { |
| int r; |
| |
| r = link_new_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_handle_bound_by_list(link); |
| if (r < 0) |
| return r; |
| |
| r = link_new_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| return link_handle_bound_to_list(link); |
| } |
| |
| 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 void link_free_carrier_maps(Link *link) { |
| assert(link); |
| |
| link_free_bound_to_list(link); |
| link_free_bound_by_list(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_drop(req); |
| } |
| |
| static Link *link_drop(Link *link) { |
| char **n; |
| |
| 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_carrier_maps(link); |
| |
| link_drop_from_master(link); |
| |
| link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
| |
| (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. */ |
| if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link) |
| hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr); |
| |
| /* 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); |
| |
| 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_config(Link *link) { |
| int k, r; |
| |
| assert(link); |
| assert(link->manager); |
| |
| r = link_drop_routes(link); |
| |
| k = link_drop_nexthops(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_addresses(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = link_drop_neighbors(link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| k = manager_drop_routing_policy_rules(link->manager, link); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| ndisc_flush(link); |
| |
| return r; |
| } |
| |
| 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_configure_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_configure_sr_iov(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_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 = dhcp4_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = dhcp6_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = ndisc_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_request_dhcp_server(link); |
| if (r < 0) |
| return r; |
| |
| r = radv_configure(link); |
| if (r < 0) |
| return r; |
| |
| r = link_lldp_rx_configure(link); |
| if (r < 0) |
| return r; |
| |
| /* Drop foreign config, but ignore loopback or critical devices. |
| * We do not want to remove loopback address or addresses used for root NFS. */ |
| if (!(link->flags & IFF_LOOPBACK) && |
| link->network->keep_configuration != KEEP_CONFIGURATION_YES) { |
| 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->sd_device, |
| &link->hw_addr.ether, |
| &link->permanent_mac, |
| link->driver, |
| link->iftype, |
| 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->sd_device) { |
| uint8_t name_assign_type = NET_NAME_UNKNOWN; |
| const char *attr; |
| |
| if (sd_device_get_sysattr_value(link->sd_device, "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; |
| } |
| |
| static int link_reconfigure_impl(Link *link, bool force) { |
| Network *network; |
| int r; |
| |
| assert(link); |
| |
| r = link_get_network(link, &network); |
| if (r == -ENOENT) { |
| link_set_state(link, LINK_STATE_UNMANAGED); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| |
| if (link->network == network && !force) |
| return 0; |
| |
| log_link_info(link, "Re-configuring with %s", network->filename); |
| |
| /* Dropping old .network file */ |
| r = link_stop_engines(link, false); |
| if (r < 0) |
| return r; |
| |
| link_drop_requests(link); |
| |
| r = link_drop_config(link); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
| log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| link_free_carrier_maps(link); |
| link_free_engines(link); |
| link->network = network_unref(link->network); |
| link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
| |
| /* Then, apply new .network file */ |
| link->network = network_ref(network); |
| link_update_operstate(link, true); |
| link_dirty(link); |
| |
| r = link_new_carrier_maps(link); |
| if (r < 0) |
| return r; |
| |
| 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; |
| |
| 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; |
| } |
| |
| static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| return link_reconfigure_handler_internal(rtnl, m, link, false); |
| } |
| |
| static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| return link_reconfigure_handler_internal(rtnl, m, link, true); |
| } |
| |
| int link_reconfigure(Link *link, bool force) { |
| int r; |
| |
| /* 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) { |
| Network *network; |
| int r; |
| |
| assert(link); |
| assert(link->ifname); |
| assert(link->manager); |
| |
| /* We may get called either from the asynchronous netlink callback, |
| * or directly from link_check_initialized() if running in a container. */ |
| if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
| return 0; |
| |
| 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; |
| |
| if (!link->network) { |
| r = wifi_get_info(link); |
| if (r < 0) |
| return r; |
| |
| r = link_get_network(link, &network); |
| if (r == -ENOENT) { |
| link_set_state(link, LINK_STATE_UNMANAGED); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| |
| if (link->flags & IFF_LOOPBACK) { |
| if (network->link_local != ADDRESS_FAMILY_NO) |
| log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); |
| |
| if (network->dhcp != ADDRESS_FAMILY_NO) |
| log_link_debug(link, "Ignoring DHCP clients for loopback link"); |
| |
| if (network->dhcp_server) |
| log_link_debug(link, "Ignoring DHCP server for loopback link"); |
| } |
| |
| link->network = network_ref(network); |
| link_update_operstate(link, false); |
| link_dirty(link); |
| } |
| |
| r = link_new_bound_to_list(link); |
| if (r < 0) |
| return r; |
| |
| return link_configure(link); |
| } |
| |
| 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) { |
| assert(link); |
| assert(device); |
| |
| /* Always replace with the new sd_device object. As the sysname (and possibly other properties |
| * or sysattrs) may be outdated. */ |
| sd_device_ref(device); |
| sd_device_unref(link->sd_device); |
| link->sd_device = device; |
| |
| /* Do not ignore unamanaged state case here. If an interface is renamed after being once |
| * configured, and the corresponding .network file has Name= in [Match] section, then the |
| * interface may be already in unmanaged state. See #20657. */ |
| if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED)) |
| return 0; |
| |
| log_link_debug(link, "udev initialized link"); |
| link_set_state(link, LINK_STATE_INITIALIZED); |
| |
| /* 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 (path_is_read_only_fs("/sys") > 0) |
| /* no udev */ |
| 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(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
| sd_device_action_t action; |
| Manager *m = userdata; |
| Link *link = NULL; |
| int r, ifindex; |
| |
| assert(m); |
| assert(device); |
| |
| r = sd_device_get_action(device, &action); |
| if (r < 0) { |
| log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m"); |
| return 0; |
| } |
| |
| /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents |
| * are "positive" events in some form, i.e. inform us about a changed or new network interface, that |
| * still exists — and we are interested in that. */ |
| if (action == SD_DEVICE_REMOVE) |
| return 0; |
| |
| r = sd_device_get_ifindex(device, &ifindex); |
| if (r < 0) { |
| log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m", |
| device_action_to_string(action)); |
| return 0; |
| } |
| |
| r = device_is_renaming(device); |
| if (r < 0) { |
| log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m", |
| device_action_to_string(action)); |
| return 0; |
| } |
| if (r > 0) { |
| log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed."); |
| return 0; |
| } |
| |
| r = link_get_by_index(m, ifindex, &link); |
| if (r < 0) { |
| log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); |
| return 0; |
| } |
| |
| r = link_initialized(link, device); |
| if (r < 0) |
| link_enter_failed(link); |
| |
| return 0; |
| } |
| |
| static int link_carrier_gained(Link *link) { |
| 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 (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(Link *link) { |
| 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 && link->network->ignore_carrier_loss) |
| return 0; |
| |
| r = link_stop_engines(link, false); |
| if (r < 0) { |
| link_enter_failed(link); |
| return r; |
| } |
| |
| r = link_drop_config(link); |
| if (r < 0) |
| return r; |
| |
| if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
| log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
| r = link_drop_foreign_config(link); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int link_carrier_reset(Link *link) { |
| int r; |
| |
| assert(link); |
| |
| if (!link_has_carrier(link)) |
| return 0; |
| |
| r = link_carrier_lost(link); |
| if (r < 0) |
| return r; |
| |
| r = link_carrier_gained(link); |
| if (r < 0) |
| return r; |
| |
| log_link_info(link, "Reset carrier"); |
| return 0; |
| } |
| |
| 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, "ActivationPolicy is \"always-off\", 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, "ActivationPolicy is \"always-on\", forcing link up."); |
| return link_request_to_bring_up_or_down(link, /* up = */ true); |
| } |
| |
| return 0; |
| } |
| |
| bool link_has_carrier(Link *link) { |
| /* see Documentation/networking/operstates.txt in the kernel sources */ |
| |
| if (link->kernel_operstate == IF_OPER_UP) |
| return true; |
| |
| if (link->kernel_operstate == IF_OPER_UNKNOWN) |
| /* operstate may not be implemented, so fall back to flags */ |
| if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && |
| !FLAGS_SET(link->flags, IFF_DORMANT)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_is_enslaved(Link *link) { |
| if (link->flags & IFF_SLAVE) |
| /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ |
| return true; |
| |
| if (!link->network) |
| return false; |
| |
| if (link->master_ifindex > 0 && link->network->bridge) |
| return true; |
| |
| /* TODO: add conditions for other netdevs. */ |
| |
| 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); |
| } |
| |
| /* for operstate we also take foreign addresses into account */ |
| SET_FOREACH(address, link->addresses_foreign) { |
| 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_lower_up, 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_lower_up = link->flags & IFF_LOWER_UP; |
| 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_lower_up && (link->flags & IFF_LOWER_UP)) { |
| r = wifi_get_info(link); |
| if (r < 0) |
| return r; |
| if (r > 0) { |
| /* All link information is up-to-date. So, it is not necessary to call |
| * RTM_GETLINK netlink method again. */ |
| r = link_reconfigure_impl(link, /* force = */ false); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| 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; |
| } |
| |
| r = link_update_lldp(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->master_ifindex) |
| return 0; |
| |
| if (link->master_ifindex == 0) |
| log_link_debug(link, "Joined to master interface: %i", master_ifindex); |
| else if (master_ifindex == 0) |
| log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex); |
| else |
| log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, 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_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 (hw_addr_is_null(&link->hw_addr)) |
| log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr)); |
| else { |
| log_link_debug(link, "Hardware address is changed: %s → %s", |
| HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr)); |
| |
| if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link) |
| hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr); |
| } |
| |
| 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 = ipv4ll_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) { |
| 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) { |
| r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.ether); |
| if (r < 0) |
| return log_link_debug_errno(link, r, "Could not update MAC address for LLDP: %m"); |
| } |
| |
| return 0; |
| } |
| |
| 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" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
| link->mtu, 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; |
| char **n; |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); |
| if (r < 0 && r != -ENODATA) |
| return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); |
| |
| 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 0; |
| } |
| |
| static int link_update_name(Link *link, sd_netlink_message *message) { |
| char ifname_from_index[IF_NAMESIZE + 1]; |
| 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; |
| |
| if (!format_ifname(link->ifindex, ifname_from_index)) |
| return log_link_debug_errno(link, SYNTHETIC_ERRNO(ENXIO), "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"); |
| |
| return 0; |
| } |
| |
| static int link_update(Link *link, sd_netlink_message *message) { |
| int r; |
| |
| assert(link); |
| assert(message); |
| |
| r = link_update_name(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_alternative_names(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_mtu(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_hardware_address(link, message); |
| if (r < 0) |
| return r; |
| |
| r = link_update_master(link, message); |
| if (r < 0) |
| return r; |
| |
| return link_update_flags(link, message); |
| } |
| |
| 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 (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), |
| |
| .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"); |
| |
| r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac); |
| if (r < 0) |
| log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m"); |
| |
| r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver); |
| if (r < 0) |
| log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); |
| |
| log_link_debug(link, "Link %d added", link->ifindex); |
| *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_warning_errno(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_warning_errno(r, "Could not process link message: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| r = link_check_initialized(link); |
| if (r < 0) { |
| log_warning_errno(r, "Failed to check link is initialized: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| } else { |
| r = link_update(link, message); |
| if (r < 0) { |
| log_warning_errno(r, "Could not process link message: %m"); |
| link_enter_failed(link); |
| return 0; |
| } |
| } |
| |
| break; |
| |
| case RTM_DELLINK: |
| link_drop(link); |
| netdev_drop(netdev); |
| |
| break; |
| |
| default: |
| assert_not_reached("Received link message with invalid RTNL message type."); |
| } |
| |
| 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); |