3264 lines
108 KiB
C
3264 lines
108 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <netinet/in.h>
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#include <linux/if.h>
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#include <linux/if_arp.h>
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#include <linux/if_link.h>
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#include <unistd.h>
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#include "alloc-util.h"
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#include "bond.h"
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#include "bridge.h"
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#include "bus-util.h"
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#include "dhcp-identifier.h"
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#include "dhcp-lease-internal.h"
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#include "env-file.h"
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#include "ethtool-util.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "ipvlan.h"
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#include "missing_network.h"
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#include "netlink-util.h"
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#include "network-internal.h"
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#include "networkd-address-label.h"
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#include "networkd-address.h"
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#include "networkd-can.h"
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#include "networkd-dhcp-server.h"
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#include "networkd-dhcp4.h"
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#include "networkd-dhcp6.h"
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#include "networkd-fdb.h"
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#include "networkd-ipv4ll.h"
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#include "networkd-ipv6-proxy-ndp.h"
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#include "networkd-link-bus.h"
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#include "networkd-link.h"
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#include "networkd-lldp-tx.h"
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#include "networkd-manager.h"
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#include "networkd-mdb.h"
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#include "networkd-ndisc.h"
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#include "networkd-neighbor.h"
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#include "networkd-nexthop.h"
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#include "networkd-sriov.h"
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#include "networkd-sysctl.h"
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#include "networkd-radv.h"
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#include "networkd-routing-policy-rule.h"
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#include "networkd-wifi.h"
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#include "set.h"
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#include "socket-util.h"
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#include "stat-util.h"
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#include "stdio-util.h"
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#include "string-table.h"
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#include "strv.h"
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#include "sysctl-util.h"
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#include "tc.h"
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#include "tmpfile-util.h"
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#include "udev-util.h"
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#include "util.h"
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#include "vrf.h"
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bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
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assert(link);
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assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
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if (link->flags & IFF_LOOPBACK)
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return false;
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if (!link->network)
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return false;
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if (link->iftype == ARPHRD_CAN)
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return false;
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if (STRPTR_IN_SET(link->kind,
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"vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
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"vti6", "nlmon", "xfrm", "bareudp"))
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return false;
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/* L3 or L3S mode do not support ARP. */
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if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
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return false;
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if (link->network->bond)
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return false;
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return link->network->link_local & mask;
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}
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bool link_ipv6ll_enabled(Link *link) {
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assert(link);
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if (!socket_ipv6_is_supported())
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return false;
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if (link->flags & IFF_LOOPBACK)
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return false;
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if (!link->network)
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return false;
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if (link->iftype == ARPHRD_CAN)
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return false;
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if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
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return false;
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if (link->network->bond)
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return false;
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return link->network->link_local & ADDRESS_FAMILY_IPV6;
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}
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bool link_ipv6_enabled(Link *link) {
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assert(link);
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if (!socket_ipv6_is_supported())
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return false;
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if (link->network->bond)
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return false;
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if (link->iftype == ARPHRD_CAN)
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return false;
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/* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
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if (link_ipv6ll_enabled(link))
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return true;
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if (network_has_static_ipv6_configurations(link->network))
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return true;
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return false;
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}
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static bool link_is_enslaved(Link *link) {
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if (link->flags & IFF_SLAVE)
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/* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
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return true;
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if (!link->network)
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return false;
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if (link->master_ifindex > 0 && link->network->bridge)
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return true;
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/* TODO: add conditions for other netdevs. */
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return false;
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}
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static void link_update_master_operstate(Link *link, NetDev *netdev) {
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Link *master;
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if (!netdev)
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return;
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if (netdev->ifindex <= 0)
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return;
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if (link_get(link->manager, netdev->ifindex, &master) < 0)
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return;
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link_update_operstate(master, true);
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}
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void link_update_operstate(Link *link, bool also_update_master) {
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LinkOperationalState operstate;
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LinkCarrierState carrier_state;
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LinkAddressState address_state;
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_cleanup_strv_free_ char **p = NULL;
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uint8_t scope = RT_SCOPE_NOWHERE;
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bool changed = false;
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Address *address;
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assert(link);
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if (link->kernel_operstate == IF_OPER_DORMANT)
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carrier_state = LINK_CARRIER_STATE_DORMANT;
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else if (link_has_carrier(link)) {
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if (link_is_enslaved(link))
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carrier_state = LINK_CARRIER_STATE_ENSLAVED;
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else
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carrier_state = LINK_CARRIER_STATE_CARRIER;
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} else if (link->flags & IFF_UP)
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carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
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else
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carrier_state = LINK_CARRIER_STATE_OFF;
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if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
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Link *slave;
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SET_FOREACH(slave, link->slaves) {
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link_update_operstate(slave, false);
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if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
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carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
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}
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}
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SET_FOREACH(address, link->addresses) {
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if (!address_is_ready(address))
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continue;
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if (address->scope < scope)
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scope = address->scope;
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}
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/* for operstate we also take foreign addresses into account */
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SET_FOREACH(address, link->addresses_foreign) {
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if (!address_is_ready(address))
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continue;
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if (address->scope < scope)
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scope = address->scope;
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}
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if (scope < RT_SCOPE_SITE)
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/* universally accessible addresses found */
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address_state = LINK_ADDRESS_STATE_ROUTABLE;
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else if (scope < RT_SCOPE_HOST)
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/* only link or site local addresses found */
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address_state = LINK_ADDRESS_STATE_DEGRADED;
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else
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/* no useful addresses found */
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address_state = LINK_ADDRESS_STATE_OFF;
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/* Mapping of address and carrier state vs operational state
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* carrier state
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* | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
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* ------------------------------------------------------------------------------
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* off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
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* address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
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* routable | off | no-carrier | dormant | degraded-carrier | routable | routable
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*/
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if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
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operstate = (LinkOperationalState) carrier_state;
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else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
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operstate = LINK_OPERSTATE_ROUTABLE;
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else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
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operstate = LINK_OPERSTATE_DEGRADED;
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else
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operstate = LINK_OPERSTATE_ENSLAVED;
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if (link->carrier_state != carrier_state) {
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link->carrier_state = carrier_state;
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changed = true;
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if (strv_extend(&p, "CarrierState") < 0)
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log_oom();
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}
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if (link->address_state != address_state) {
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link->address_state = address_state;
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changed = true;
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if (strv_extend(&p, "AddressState") < 0)
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log_oom();
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}
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if (link->operstate != operstate) {
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link->operstate = operstate;
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changed = true;
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if (strv_extend(&p, "OperationalState") < 0)
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log_oom();
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}
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if (p)
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link_send_changed_strv(link, p);
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if (changed)
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link_dirty(link);
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if (also_update_master && link->network) {
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link_update_master_operstate(link, link->network->bond);
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link_update_master_operstate(link, link->network->bridge);
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}
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}
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#define FLAG_STRING(string, flag, old, new) \
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(((old ^ new) & flag) \
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? ((old & flag) ? (" -" string) : (" +" string)) \
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: "")
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static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
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unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
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uint8_t operstate;
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int r;
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assert(link);
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r = sd_rtnl_message_link_get_flags(m, &flags);
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if (r < 0)
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return log_link_warning_errno(link, r, "Could not get link flags: %m");
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r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
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if (r < 0)
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/* if we got a message without operstate, take it to mean
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the state was unchanged */
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operstate = link->kernel_operstate;
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if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
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return 0;
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if (link->flags != flags) {
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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",
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FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
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FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
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FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
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FLAG_STRING("UP", IFF_UP, link->flags, flags),
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FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
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FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
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FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
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FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
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FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
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FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
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FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
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FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
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FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
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FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
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FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
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FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
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FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
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FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
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FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
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unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
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IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
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IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
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IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
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IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
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IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
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unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
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unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
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/* link flags are currently at most 18 bits, let's align to
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* printing 20 */
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if (unknown_flags_added)
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log_link_debug(link,
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"Unknown link flags gained: %#.5x (ignoring)",
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unknown_flags_added);
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if (unknown_flags_removed)
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log_link_debug(link,
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"Unknown link flags lost: %#.5x (ignoring)",
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unknown_flags_removed);
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}
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link->flags = flags;
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link->kernel_operstate = operstate;
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link_update_operstate(link, true);
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return 0;
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}
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static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
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_cleanup_(link_unrefp) Link *link = NULL;
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const char *ifname, *kind = NULL;
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unsigned short iftype;
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int r, ifindex;
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uint16_t type;
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assert(manager);
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assert(message);
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assert(ret);
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/* check for link kind */
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r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
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if (r == 0) {
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(void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
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r = sd_netlink_message_exit_container(message);
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if (r < 0)
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return r;
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}
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r = sd_netlink_message_get_type(message, &type);
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if (r < 0)
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return r;
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else if (type != RTM_NEWLINK)
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return -EINVAL;
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r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
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if (r < 0)
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return r;
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else if (ifindex <= 0)
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return -EINVAL;
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r = sd_rtnl_message_link_get_type(message, &iftype);
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if (r < 0)
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return r;
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r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
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if (r < 0)
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return r;
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link = new(Link, 1);
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if (!link)
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return -ENOMEM;
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*link = (Link) {
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.n_ref = 1,
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.manager = manager,
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.state = LINK_STATE_PENDING,
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.ifindex = ifindex,
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.iftype = iftype,
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.n_dns = (unsigned) -1,
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.dns_default_route = -1,
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.llmnr = _RESOLVE_SUPPORT_INVALID,
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.mdns = _RESOLVE_SUPPORT_INVALID,
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.dnssec_mode = _DNSSEC_MODE_INVALID,
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.dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
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};
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link->ifname = strdup(ifname);
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if (!link->ifname)
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return -ENOMEM;
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if (kind) {
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link->kind = strdup(kind);
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if (!link->kind)
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return -ENOMEM;
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}
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r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
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if (r < 0)
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log_link_debug_errno(link, r, "New device has no master, continuing without");
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r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
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if (r < 0)
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log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
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r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
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if (r < 0)
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log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
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r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
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if (r < 0)
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log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
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r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
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if (r < 0 && r != -ENODATA)
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return r;
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if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
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return -ENOMEM;
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if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
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return -ENOMEM;
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if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
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return -ENOMEM;
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r = hashmap_ensure_allocated(&manager->links, NULL);
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if (r < 0)
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return r;
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r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
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if (r < 0)
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return r;
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r = link_update_flags(link, message, false);
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if (r < 0)
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return r;
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*ret = TAKE_PTR(link);
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return 0;
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}
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void link_ntp_settings_clear(Link *link) {
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link->ntp = strv_free(link->ntp);
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}
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void link_dns_settings_clear(Link *link) {
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if (link->n_dns != (unsigned) -1)
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for (unsigned i = 0; i < link->n_dns; i++)
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in_addr_full_free(link->dns[i]);
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link->dns = mfree(link->dns);
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link->n_dns = (unsigned) -1;
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link->search_domains = ordered_set_free_free(link->search_domains);
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link->route_domains = ordered_set_free_free(link->route_domains);
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link->dns_default_route = -1;
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link->llmnr = _RESOLVE_SUPPORT_INVALID;
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link->mdns = _RESOLVE_SUPPORT_INVALID;
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link->dnssec_mode = _DNSSEC_MODE_INVALID;
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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->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
|
|
|
|
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);
|
|
|
|
ipv4_dad_unref(link);
|
|
}
|
|
|
|
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->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_free_engines(link);
|
|
free(link->lease_file);
|
|
free(link->lldp_file);
|
|
|
|
free(link->ifname);
|
|
strv_free(link->alternative_names);
|
|
free(link->kind);
|
|
free(link->ssid);
|
|
free(link->driver);
|
|
|
|
(void) unlink(link->state_file);
|
|
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(Manager *m, int ifindex, Link **ret) {
|
|
Link *link;
|
|
|
|
assert(m);
|
|
assert(ifindex > 0);
|
|
assert(ret);
|
|
|
|
link = hashmap_get(m->links, INT_TO_PTR(ifindex));
|
|
if (!link)
|
|
return -ENODEV;
|
|
|
|
*ret = link;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void link_enter_unmanaged(Link *link) {
|
|
assert(link);
|
|
|
|
link_set_state(link, LINK_STATE_UNMANAGED);
|
|
|
|
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->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_ipv4acd_stop(link->dhcp_acd);
|
|
if (k < 0)
|
|
r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %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 = ipv4_dad_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);
|
|
|
|
link_dirty(link);
|
|
}
|
|
|
|
static int link_join_netdevs_after_configured(Link *link) {
|
|
NetDev *netdev;
|
|
int r;
|
|
|
|
HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
|
|
if (netdev->ifindex > 0)
|
|
/* Assume already enslaved. */
|
|
continue;
|
|
|
|
if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
|
|
continue;
|
|
|
|
log_struct(LOG_DEBUG,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(netdev),
|
|
LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
|
|
|
|
r = netdev_join(netdev, link, NULL);
|
|
if (r < 0)
|
|
return log_struct_errno(LOG_WARNING, r,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(netdev),
|
|
LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void link_enter_configured(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->state != LINK_STATE_CONFIGURING)
|
|
return;
|
|
|
|
link_set_state(link, LINK_STATE_CONFIGURED);
|
|
|
|
(void) link_join_netdevs_after_configured(link);
|
|
|
|
link_dirty(link);
|
|
}
|
|
|
|
void link_check_ready(Link *link) {
|
|
Address *a;
|
|
|
|
assert(link);
|
|
|
|
if (link->state == LINK_STATE_CONFIGURED)
|
|
return;
|
|
|
|
if (link->state != LINK_STATE_CONFIGURING) {
|
|
log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
|
|
return;
|
|
}
|
|
|
|
if (!link->network)
|
|
return;
|
|
|
|
if (!link->addresses_configured) {
|
|
log_link_debug(link, "%s(): static addresses are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->neighbors_configured) {
|
|
log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
SET_FOREACH(a, link->addresses)
|
|
if (!address_is_ready(a)) {
|
|
_cleanup_free_ char *str = NULL;
|
|
|
|
(void) in_addr_to_string(a->family, &a->in_addr, &str);
|
|
log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
|
|
return;
|
|
}
|
|
|
|
if (!link->static_routes_configured) {
|
|
log_link_debug(link, "%s(): static routes are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->static_nexthops_configured) {
|
|
log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->routing_policy_rules_configured) {
|
|
log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->tc_configured) {
|
|
log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->sr_iov_configured) {
|
|
log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (!link->bridge_mdb_configured) {
|
|
log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (link_has_carrier(link) || !link->network->configure_without_carrier) {
|
|
bool has_ndisc_address = false;
|
|
NDiscAddress *n;
|
|
|
|
if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
|
|
log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (link_ipv6ll_enabled(link) &&
|
|
in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
|
|
log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
SET_FOREACH(n, link->ndisc_addresses)
|
|
if (!n->marked) {
|
|
has_ndisc_address = true;
|
|
break;
|
|
}
|
|
|
|
if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
|
|
!link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
|
|
!(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
|
|
log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
|
|
return;
|
|
}
|
|
|
|
if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_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_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
|
|
/* When DHCP or RA is enabled, at least one protocol must provide an address, or
|
|
* an IPv4ll fallback address must be configured. */
|
|
log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
|
|
return;
|
|
}
|
|
|
|
log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
|
|
__func__,
|
|
yes_no(link->dhcp4_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_enter_configured(link);
|
|
|
|
return;
|
|
}
|
|
|
|
static int link_set_static_configs(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->state != _LINK_STATE_INVALID);
|
|
|
|
/* Reset all *_configured flags we are configuring. */
|
|
link->request_static_addresses = false;
|
|
link->addresses_configured = false;
|
|
link->addresses_ready = false;
|
|
link->neighbors_configured = false;
|
|
link->static_routes_configured = false;
|
|
link->static_nexthops_configured = false;
|
|
link->routing_policy_rules_configured = false;
|
|
|
|
r = link_set_bridge_fdb(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_bridge_mdb(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_neighbors(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_addresses(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_address_labels(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* now that we can figure out a default address for the dhcp server, start it */
|
|
r = dhcp4_server_configure(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_configure_continue(Link *link);
|
|
|
|
static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
|
|
else
|
|
log_link_debug(link, "Setting MAC address done.");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_set_mac(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
if (!link->network->mac)
|
|
return 0;
|
|
|
|
log_link_debug(link, "Setting MAC address");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set MAC address: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
|
|
else
|
|
log_link_debug(link, "Setting nomaster done.");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_set_nomaster(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
/* set it free if not enslaved with networkd */
|
|
if (link->network->bridge || link->network->bond || link->network->vrf)
|
|
return 0;
|
|
|
|
log_link_debug(link, "Setting nomaster");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(link);
|
|
assert(link->ifname);
|
|
|
|
link->setting_mtu = false;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
|
|
else
|
|
log_link_debug(link, "Setting MTU done.");
|
|
|
|
if (link->state == LINK_STATE_INITIALIZED) {
|
|
r = link_configure_continue(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int link_set_mtu(Link *link, uint32_t mtu) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
if (mtu == 0 || link->setting_mtu)
|
|
return 0;
|
|
|
|
if (link->mtu == mtu)
|
|
return 0;
|
|
|
|
log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
/* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
|
|
* on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
|
|
if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
|
|
|
|
log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
|
|
"IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
|
|
|
|
mtu = IPV6_MIN_MTU;
|
|
}
|
|
|
|
r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append MTU: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
link->setting_mtu = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool link_reduces_vlan_mtu(Link *link) {
|
|
/* See netif_reduces_vlan_mtu() in kernel. */
|
|
return streq_ptr(link->kind, "macsec");
|
|
}
|
|
|
|
static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
|
|
uint32_t mtu = 0;
|
|
NetDev *dev;
|
|
|
|
HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
|
|
if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
|
|
/* See vlan_dev_change_mtu() in kernel. */
|
|
mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
|
|
|
|
else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
|
|
/* See macvlan_change_mtu() in kernel. */
|
|
mtu = dev->mtu;
|
|
|
|
return mtu;
|
|
}
|
|
|
|
static int link_configure_mtu(Link *link) {
|
|
uint32_t mtu;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->mtu > 0)
|
|
return link_set_mtu(link, link->network->mtu);
|
|
|
|
mtu = link_get_requested_mtu_by_stacked_netdevs(link);
|
|
if (link->mtu >= mtu)
|
|
return 0;
|
|
|
|
log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
|
|
"If it is not desired, then please explicitly specify MTUBytes= setting.",
|
|
link->mtu, mtu);
|
|
|
|
return link_set_mtu(link, mtu);
|
|
}
|
|
|
|
static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(link);
|
|
assert(link->ifname);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_set_flags(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
unsigned ifi_change = 0;
|
|
unsigned ifi_flags = 0;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
if (link->flags & IFF_LOOPBACK)
|
|
return 0;
|
|
|
|
if (!link->network)
|
|
return 0;
|
|
|
|
if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
|
|
return 0;
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
if (link->network->arp >= 0) {
|
|
ifi_change |= IFF_NOARP;
|
|
SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
|
|
}
|
|
|
|
if (link->network->multicast >= 0) {
|
|
ifi_change |= IFF_MULTICAST;
|
|
SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
|
|
}
|
|
|
|
if (link->network->allmulticast >= 0) {
|
|
ifi_change |= IFF_ALLMULTI;
|
|
SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
|
|
}
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set link flags: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_acquire_ipv6_conf(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (link->ndisc) {
|
|
log_link_debug(link, "Discovering IPv6 routers");
|
|
|
|
r = sd_ndisc_start(link->ndisc);
|
|
if (r < 0 && r != -EBUSY)
|
|
return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
|
|
}
|
|
|
|
if (link->radv) {
|
|
assert(link->radv);
|
|
assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
|
|
|
|
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");
|
|
}
|
|
|
|
if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
|
|
DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
|
|
DHCP6_CLIENT_START_MODE_SOLICIT)) {
|
|
assert(link->dhcp6_client);
|
|
assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
|
|
|
|
r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
|
|
if (r < 0 && r != -EBUSY)
|
|
return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
|
|
else
|
|
log_link_debug(link, "Acquiring DHCPv6 lease");
|
|
}
|
|
|
|
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_ipv4_conf(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->event);
|
|
|
|
if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
|
|
assert(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_client) {
|
|
log_link_debug(link, "Acquiring DHCPv4 lease");
|
|
|
|
r = sd_dhcp_client_start(link->dhcp_client);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_acquire_conf(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
r = link_acquire_ipv4_conf(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
|
|
r = link_acquire_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;
|
|
}
|
|
|
|
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 int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
link->setting_genmode = false;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
|
|
else
|
|
log_link_debug(link, "Setting address genmode done.");
|
|
|
|
if (link->state == LINK_STATE_INITIALIZED) {
|
|
r = link_configure_continue(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_configure_addrgen_mode(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
uint8_t ipv6ll_mode;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
if (!socket_ipv6_is_supported() || link->setting_genmode)
|
|
return 0;
|
|
|
|
log_link_debug(link, "Setting address genmode for link");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
|
|
|
|
r = sd_netlink_message_open_container(req, AF_INET6);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
|
|
|
|
if (!link_ipv6ll_enabled(link))
|
|
ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
|
|
else if (link->network->ipv6ll_address_gen_mode < 0) {
|
|
r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
|
|
if (r < 0) {
|
|
/* The file may not exist. And even if it exists, when stable_secret is unset,
|
|
* reading the file fails with EIO. */
|
|
log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
|
|
|
|
ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
|
|
} else
|
|
ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
|
|
} else
|
|
ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
|
|
|
|
r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
|
|
|
|
r = sd_netlink_message_close_container(req);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
|
|
|
|
r = sd_netlink_message_close_container(req);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
link->setting_genmode = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
/* we warn but don't fail the link, as it may be brought up later */
|
|
log_link_message_warning_errno(link, m, r, "Could not bring up interface");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_up(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
log_link_debug(link, "Bringing link up");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set link flags: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not bring down interface");
|
|
|
|
return 1;
|
|
}
|
|
|
|
int link_down(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);
|
|
|
|
log_link_debug(link, "Bringing link down");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
|
|
RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set link flags: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req,
|
|
callback ?: link_down_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_set_group(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
if (link->network->group <= 0)
|
|
return 0;
|
|
|
|
log_link_debug(link, "Setting group");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set link group: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_handle_bound_to_list(Link *link) {
|
|
Link *l;
|
|
int r;
|
|
bool required_up = false;
|
|
bool link_is_up = false;
|
|
|
|
assert(link);
|
|
|
|
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) {
|
|
r = link_down(link, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (required_up && !link_is_up) {
|
|
r = link_up(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_handle_bound_by_list(Link *link) {
|
|
Link *l;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
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_allocated(h, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_new_bound_by_list(Link *link) {
|
|
Manager *m;
|
|
Link *carrier;
|
|
int r;
|
|
bool list_updated = false;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
|
|
m = link->manager;
|
|
|
|
HASHMAP_FOREACH(carrier, m->links) {
|
|
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;
|
|
|
|
list_updated = true;
|
|
}
|
|
}
|
|
|
|
if (list_updated)
|
|
link_dirty(link);
|
|
|
|
HASHMAP_FOREACH(carrier, link->bound_by_links) {
|
|
r = link_put_carrier(carrier, link, &carrier->bound_to_links);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_dirty(carrier);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_new_bound_to_list(Link *link) {
|
|
Manager *m;
|
|
Link *carrier;
|
|
int r;
|
|
bool list_updated = false;
|
|
|
|
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) {
|
|
if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
|
|
r = link_put_carrier(link, carrier, &link->bound_to_links);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
list_updated = true;
|
|
}
|
|
}
|
|
|
|
if (list_updated)
|
|
link_dirty(link);
|
|
|
|
HASHMAP_FOREACH (carrier, link->bound_to_links) {
|
|
r = link_put_carrier(carrier, link, &carrier->bound_by_links);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_dirty(carrier);
|
|
}
|
|
|
|
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;
|
|
|
|
r = link_handle_bound_to_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void link_free_bound_to_list(Link *link) {
|
|
Link *bound_to;
|
|
|
|
HASHMAP_FOREACH (bound_to, link->bound_to_links) {
|
|
hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
|
|
|
|
if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
|
|
link_dirty(bound_to);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void link_free_bound_by_list(Link *link) {
|
|
Link *bound_by;
|
|
|
|
HASHMAP_FOREACH (bound_by, link->bound_by_links) {
|
|
hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
|
|
|
|
if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
|
|
link_dirty(bound_by);
|
|
link_handle_bound_to_list(bound_by);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void link_free_carrier_maps(Link *link) {
|
|
bool list_updated = false;
|
|
|
|
assert(link);
|
|
|
|
if (!hashmap_isempty(link->bound_to_links)) {
|
|
link_free_bound_to_list(link);
|
|
list_updated = true;
|
|
}
|
|
|
|
if (!hashmap_isempty(link->bound_by_links)) {
|
|
link_free_bound_by_list(link);
|
|
list_updated = true;
|
|
}
|
|
|
|
if (list_updated)
|
|
link_dirty(link);
|
|
|
|
return;
|
|
}
|
|
|
|
static int link_append_to_master(Link *link, NetDev *netdev) {
|
|
Link *master;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(netdev);
|
|
|
|
r = link_get(link->manager, netdev->ifindex, &master);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
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, NetDev *netdev) {
|
|
Link *master;
|
|
|
|
assert(link);
|
|
|
|
if (!link->manager || !netdev)
|
|
return;
|
|
|
|
if (link_get(link->manager, netdev->ifindex, &master) < 0)
|
|
return;
|
|
|
|
link_unref(set_remove(master->slaves, link));
|
|
}
|
|
|
|
static void link_detach_from_manager(Link *link) {
|
|
if (!link || !link->manager)
|
|
return;
|
|
|
|
link_unref(set_remove(link->manager->links_requesting_uuid, link));
|
|
link_clean(link);
|
|
|
|
/* The following must be called at last. */
|
|
assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
|
|
link_unref(link);
|
|
}
|
|
|
|
void link_drop(Link *link) {
|
|
if (!link || link->state == LINK_STATE_LINGER)
|
|
return;
|
|
|
|
link_set_state(link, LINK_STATE_LINGER);
|
|
|
|
link_free_carrier_maps(link);
|
|
|
|
if (link->network) {
|
|
link_drop_from_master(link, link->network->bridge);
|
|
link_drop_from_master(link, link->network->bond);
|
|
}
|
|
|
|
log_link_debug(link, "Link removed");
|
|
|
|
(void) unlink(link->state_file);
|
|
link_detach_from_manager(link);
|
|
}
|
|
|
|
static int link_joined(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!hashmap_isempty(link->bound_to_links)) {
|
|
r = link_handle_bound_to_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (!(link->flags & IFF_UP)) {
|
|
r = link_up(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (link->network->bridge) {
|
|
r = link_set_bridge(link);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Could not set bridge message: %m");
|
|
|
|
r = link_append_to_master(link, link->network->bridge);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
|
|
}
|
|
|
|
if (link->network->bond) {
|
|
r = link_set_bond(link);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Could not set bond message: %m");
|
|
|
|
r = link_append_to_master(link, link->network->bond);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
|
|
}
|
|
|
|
r = link_set_bridge_vlan(link);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Could not set bridge vlan: %m");
|
|
|
|
/* Skip setting up addresses until it gets carrier,
|
|
or it would try to set addresses twice,
|
|
which is bad for non-idempotent steps. */
|
|
if (!link_has_carrier(link) && !link->network->configure_without_carrier)
|
|
return 0;
|
|
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
|
|
r = link_acquire_conf(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return link_set_static_configs(link);
|
|
}
|
|
|
|
static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->enslaving > 0);
|
|
|
|
link->enslaving--;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0 && r != -EEXIST) {
|
|
log_link_message_warning_errno(link, m, r, "Could not join netdev");
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
log_link_debug(link, "Joined netdev");
|
|
|
|
if (link->enslaving == 0) {
|
|
r = link_joined(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_enter_join_netdev(Link *link) {
|
|
NetDev *netdev;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->state == LINK_STATE_INITIALIZED);
|
|
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
|
|
link_dirty(link);
|
|
link->enslaving = 0;
|
|
|
|
if (link->network->bond) {
|
|
if (link->network->bond->state == NETDEV_STATE_READY &&
|
|
link->network->bond->ifindex == link->master_ifindex)
|
|
return link_joined(link);
|
|
|
|
log_struct(LOG_DEBUG,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->bond),
|
|
LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
|
|
|
|
link->enslaving++;
|
|
|
|
r = netdev_join(link->network->bond, link, netdev_join_handler);
|
|
if (r < 0) {
|
|
log_struct_errno(LOG_WARNING, r,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->bond),
|
|
LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (link->network->bridge) {
|
|
log_struct(LOG_DEBUG,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->bridge),
|
|
LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
|
|
|
|
link->enslaving++;
|
|
|
|
r = netdev_join(link->network->bridge, link, netdev_join_handler);
|
|
if (r < 0) {
|
|
log_struct_errno(LOG_WARNING, r,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->bridge),
|
|
LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (link->network->vrf) {
|
|
log_struct(LOG_DEBUG,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->vrf),
|
|
LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
|
|
|
|
link->enslaving++;
|
|
|
|
r = netdev_join(link->network->vrf, link, netdev_join_handler);
|
|
if (r < 0) {
|
|
log_struct_errno(LOG_WARNING, r,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(link->network->vrf),
|
|
LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
|
|
|
|
if (netdev->ifindex > 0)
|
|
/* Assume already enslaved. */
|
|
continue;
|
|
|
|
if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
|
|
continue;
|
|
|
|
log_struct(LOG_DEBUG,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(netdev),
|
|
LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
|
|
|
|
link->enslaving++;
|
|
|
|
r = netdev_join(netdev, link, netdev_join_handler);
|
|
if (r < 0) {
|
|
log_struct_errno(LOG_WARNING, r,
|
|
LOG_LINK_INTERFACE(link),
|
|
LOG_NETDEV_INTERFACE(netdev),
|
|
LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (link->enslaving == 0)
|
|
return link_joined(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_drop_foreign_config(Link *link) {
|
|
int r;
|
|
|
|
r = link_drop_foreign_addresses(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_drop_foreign_neighbors(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return link_drop_foreign_routes(link);
|
|
}
|
|
|
|
static int link_drop_config(Link *link) {
|
|
int r;
|
|
|
|
r = link_drop_addresses(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_drop_neighbors(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_drop_routes(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
ndisc_flush(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_configure(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->state == LINK_STATE_INITIALIZED);
|
|
|
|
r = link_configure_traffic_control(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_configure_sr_iov(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (link->iftype == ARPHRD_CAN)
|
|
return link_configure_can(link);
|
|
|
|
r = link_set_sysctl(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_ipv6_proxy_ndp_addresses(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_mac(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_nomaster(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_flags(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_set_group(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 = radv_configure(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_lldp_rx_configure(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_configure_mtu(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_configure_addrgen_mode(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return link_configure_continue(link);
|
|
}
|
|
|
|
/* The configuration continues in this separate function, instead of
|
|
* including this in the above link_configure() function, for two
|
|
* reasons:
|
|
* 1) some devices reset the link when the mtu is set, which caused
|
|
* an infinite loop here in networkd; see:
|
|
* https://github.com/systemd/systemd/issues/6593
|
|
* https://github.com/systemd/systemd/issues/9831
|
|
* 2) if ipv6ll is disabled, then bringing the interface up must be
|
|
* delayed until after we get confirmation from the kernel that
|
|
* the addr_gen_mode parameter has been set (via netlink), see:
|
|
* https://github.com/systemd/systemd/issues/13882
|
|
*/
|
|
static int link_configure_continue(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->state == LINK_STATE_INITIALIZED);
|
|
|
|
if (link->setting_mtu || link->setting_genmode)
|
|
return 0;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* The kernel resets ipv6 mtu after changing device mtu;
|
|
* we must set this here, after we've set device mtu */
|
|
r = link_set_ipv6_mtu(link);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
|
|
|
|
return link_enter_join_netdev(link);
|
|
}
|
|
|
|
static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
|
|
Network *network;
|
|
int r;
|
|
|
|
if (m) {
|
|
_cleanup_strv_free_ char **s = NULL;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
|
|
if (r < 0 && r != -ENODATA)
|
|
return r;
|
|
|
|
strv_free_and_replace(link->alternative_names, s);
|
|
}
|
|
|
|
r = network_get(link->manager, link->iftype, link->sd_device,
|
|
link->ifname, link->alternative_names, link->driver,
|
|
&link->mac, &link->permanent_mac,
|
|
link->wlan_iftype, link->ssid, &link->bssid, &network);
|
|
if (r == -ENOENT) {
|
|
link_enter_unmanaged(link);
|
|
return 0;
|
|
} else if (r == 0 && network->unmanaged) {
|
|
link_enter_unmanaged(link);
|
|
return 0;
|
|
} else 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;
|
|
|
|
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 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);
|
|
|
|
/* Then, apply new .network file */
|
|
r = network_apply(network, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = link_new_carrier_maps(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_set_state(link, LINK_STATE_INITIALIZED);
|
|
link_dirty(link);
|
|
|
|
/* link_configure_duid() returns 0 if it requests product UUID. In that case,
|
|
* link_configure() is called later asynchronously. */
|
|
r = link_configure_duid(link);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = link_configure(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
r = link_reconfigure_internal(link, m, false);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
r = link_reconfigure_internal(link, m, true);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int link_reconfigure(Link *link, bool force) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
|
|
return 0;
|
|
|
|
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,
|
|
force ? link_force_reconfigure_handler : link_reconfigure_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 for link_add() if running in a container. See link_add(). */
|
|
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 = network_get(link->manager, link->iftype, link->sd_device,
|
|
link->ifname, link->alternative_names, link->driver,
|
|
&link->mac, &link->permanent_mac,
|
|
link->wlan_iftype, link->ssid, &link->bssid, &network);
|
|
if (r == -ENOENT) {
|
|
link_enter_unmanaged(link);
|
|
return 0;
|
|
} else if (r == 0 && network->unmanaged) {
|
|
link_enter_unmanaged(link);
|
|
return 0;
|
|
} else 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");
|
|
}
|
|
|
|
r = network_apply(network, link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = link_new_bound_to_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* link_configure_duid() returns 0 if it requests product UUID. In that case,
|
|
* link_configure() is called later asynchronously. */
|
|
r = link_configure_duid(link);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = link_configure(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
_cleanup_strv_free_ char **s = NULL;
|
|
int r;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
|
|
link_enter_failed(link);
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
|
|
if (r < 0 && r != -ENODATA) {
|
|
link_enter_failed(link);
|
|
return 0;
|
|
}
|
|
|
|
strv_free_and_replace(link->alternative_names, s);
|
|
|
|
r = link_initialized_and_synced(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
int link_initialized(Link *link, sd_device *device) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
assert(device);
|
|
|
|
if (link->state != LINK_STATE_PENDING)
|
|
return 0;
|
|
|
|
if (link->sd_device)
|
|
return 0;
|
|
|
|
log_link_debug(link, "udev initialized link");
|
|
link_set_state(link, LINK_STATE_INITIALIZED);
|
|
|
|
link->sd_device = sd_device_ref(device);
|
|
|
|
/* 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 */
|
|
|
|
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, link_initialized_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_load(Link *link) {
|
|
_cleanup_free_ char *network_file = NULL,
|
|
*addresses = NULL,
|
|
*routes = NULL,
|
|
*dhcp4_address = NULL,
|
|
*ipv4ll_address = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
r = parse_env_file(NULL, link->state_file,
|
|
"NETWORK_FILE", &network_file,
|
|
"ADDRESSES", &addresses,
|
|
"ROUTES", &routes,
|
|
"DHCP4_ADDRESS", &dhcp4_address,
|
|
"IPV4LL_ADDRESS", &ipv4ll_address);
|
|
if (r < 0 && r != -ENOENT)
|
|
return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
|
|
|
|
if (network_file) {
|
|
Network *network;
|
|
char *suffix;
|
|
|
|
/* drop suffix */
|
|
suffix = strrchr(network_file, '.');
|
|
if (!suffix) {
|
|
log_link_debug(link, "Failed to get network name from %s", network_file);
|
|
goto network_file_fail;
|
|
}
|
|
*suffix = '\0';
|
|
|
|
r = network_get_by_name(link->manager, basename(network_file), &network);
|
|
if (r < 0) {
|
|
log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
|
|
goto network_file_fail;
|
|
}
|
|
|
|
r = network_apply(network, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
|
|
}
|
|
|
|
network_file_fail:
|
|
|
|
r = link_deserialize_addresses(link, addresses);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
|
|
|
|
r = link_deserialize_routes(link, routes);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
|
|
|
|
r = link_deserialize_dhcp4(link, dhcp4_address);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
|
|
|
|
r = link_deserialize_ipv4ll(link, ipv4ll_address);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
|
|
_cleanup_(sd_device_unrefp) sd_device *device = NULL;
|
|
char ifindex_str[2 + DECIMAL_STR_MAX(int)];
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(m->rtnl);
|
|
assert(message);
|
|
assert(ret);
|
|
|
|
r = link_new(m, message, ret);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link = *ret;
|
|
|
|
log_link_debug(link, "Link %d added", link->ifindex);
|
|
|
|
r = link_load(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (path_is_read_only_fs("/sys") <= 0) {
|
|
/* udev should be around */
|
|
sprintf(ifindex_str, "n%d", link->ifindex);
|
|
r = sd_device_new_from_device_id(&device, ifindex_str);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_device_get_is_initialized(device);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
|
|
goto failed;
|
|
}
|
|
if (r == 0) {
|
|
/* not yet ready */
|
|
log_link_debug(link, "link pending udev initialization...");
|
|
return 0;
|
|
}
|
|
|
|
r = device_is_renaming(device);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
|
|
goto failed;
|
|
}
|
|
if (r > 0) {
|
|
log_link_debug(link, "Interface is being renamed, pending initialization.");
|
|
return 0;
|
|
}
|
|
|
|
r = link_initialized(link, device);
|
|
if (r < 0)
|
|
goto failed;
|
|
} else {
|
|
r = link_initialized_and_synced(link);
|
|
if (r < 0)
|
|
goto failed;
|
|
}
|
|
|
|
return 0;
|
|
failed:
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
|
|
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_ipv6_conf(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_carrier_gained(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
r = wifi_get_info(link);
|
|
if (r < 0)
|
|
return r;
|
|
if (r > 0) {
|
|
r = link_reconfigure_internal(link, NULL, false);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
|
|
r = link_acquire_conf(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
r = link_set_static_configs(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = link_handle_bound_by_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!link->bridge_mdb_configured) {
|
|
r = link_set_bridge_mdb(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (streq_ptr(link->kind, "bridge")) {
|
|
Link *slave;
|
|
|
|
SET_FOREACH(slave, link->slaves) {
|
|
if (slave->bridge_mdb_configured)
|
|
continue;
|
|
|
|
r = link_set_bridge_mdb(slave);
|
|
if (r < 0)
|
|
link_enter_failed(slave);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_carrier_lost(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (link->network && link->network->ignore_carrier_loss)
|
|
return 0;
|
|
|
|
/* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
|
|
* setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
|
|
* configuration and stop the clients as well. */
|
|
if (link->setting_mtu)
|
|
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 config", link_state_to_string(link->state));
|
|
r = link_drop_foreign_config(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = link_handle_bound_by_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_carrier_reset(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (link_has_carrier(link)) {
|
|
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;
|
|
}
|
|
|
|
/* This is called every time an interface admin state changes to up;
|
|
* specifically, when IFF_UP flag changes from unset to set */
|
|
static int link_admin_state_up(Link *link) {
|
|
int r;
|
|
|
|
/* We set the ipv6 mtu after the device mtu, but the kernel resets
|
|
* ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
|
|
* ipv6_mtu_set prevents this from trying to set it too early before
|
|
* the link->network has been setup; we only need to reset it
|
|
* here if we've already set it during normal initialization. */
|
|
if (link->ipv6_mtu_set) {
|
|
r = link_set_ipv6_mtu(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_update(Link *link, sd_netlink_message *m) {
|
|
_cleanup_strv_free_ char **s = NULL;
|
|
struct ether_addr mac;
|
|
const char *ifname;
|
|
uint32_t mtu;
|
|
bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
|
|
int old_master, r;
|
|
|
|
assert(link);
|
|
assert(link->ifname);
|
|
assert(m);
|
|
|
|
if (link->state == LINK_STATE_LINGER) {
|
|
log_link_info(link, "Link re-added");
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
|
|
r = link_new_carrier_maps(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
|
|
if (r >= 0 && !streq(ifname, link->ifname)) {
|
|
Manager *manager = link->manager;
|
|
|
|
log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
|
|
|
|
link_drop(link);
|
|
r = link_add(manager, m, &link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
|
|
if (r >= 0)
|
|
strv_free_and_replace(link->alternative_names, s);
|
|
|
|
r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
|
|
if (r >= 0 && mtu > 0) {
|
|
link->mtu = mtu;
|
|
if (link->original_mtu == 0) {
|
|
link->original_mtu = mtu;
|
|
log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
|
|
}
|
|
|
|
if (link->dhcp_client) {
|
|
r = sd_dhcp_client_set_mtu(link->dhcp_client,
|
|
link->mtu);
|
|
if (r < 0)
|
|
return log_link_warning_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_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
|
|
}
|
|
}
|
|
|
|
/* The kernel may broadcast NEWLINK messages without the MAC address
|
|
set, simply ignore them. */
|
|
r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
|
|
if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
|
|
|
|
memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
|
|
|
|
log_link_debug(link, "Gained new MAC address: "
|
|
"%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
|
|
mac.ether_addr_octet[0],
|
|
mac.ether_addr_octet[1],
|
|
mac.ether_addr_octet[2],
|
|
mac.ether_addr_octet[3],
|
|
mac.ether_addr_octet[4],
|
|
mac.ether_addr_octet[5]);
|
|
|
|
r = ipv4ll_update_mac(link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
|
|
|
|
r = dhcp4_update_mac(link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
|
|
|
|
r = dhcp6_update_mac(link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
|
|
|
|
r = radv_update_mac(link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
|
|
|
|
if (link->ndisc) {
|
|
r = sd_ndisc_set_mac(link->ndisc, &link->mac);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
|
|
}
|
|
|
|
r = ipv4_dad_update_mac(link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
|
|
}
|
|
|
|
old_master = link->master_ifindex;
|
|
(void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
|
|
|
|
link_was_admin_up = link->flags & IFF_UP;
|
|
had_carrier = link_has_carrier(link);
|
|
|
|
r = link_update_flags(link, m, old_master != link->master_ifindex);
|
|
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_update_lldp(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
carrier_gained = !had_carrier && link_has_carrier(link);
|
|
carrier_lost = had_carrier && !link_has_carrier(link);
|
|
|
|
if (carrier_gained) {
|
|
log_link_info(link, "Gained carrier");
|
|
|
|
r = link_carrier_gained(link);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (carrier_lost) {
|
|
log_link_info(link, "Lost carrier");
|
|
|
|
r = link_carrier_lost(link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
|
|
bool space = false;
|
|
Link *link;
|
|
|
|
assert(f);
|
|
assert(prefix);
|
|
|
|
if (hashmap_isempty(h))
|
|
return;
|
|
|
|
fputs(prefix, f);
|
|
HASHMAP_FOREACH(link, h) {
|
|
if (space)
|
|
fputc(' ', f);
|
|
|
|
fprintf(f, "%i", link->ifindex);
|
|
space = true;
|
|
}
|
|
|
|
fputc('\n', f);
|
|
}
|
|
|
|
static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
|
|
for (unsigned j = 0; j < n_dns; j++) {
|
|
const char *str;
|
|
|
|
if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
|
|
continue;
|
|
|
|
str = in_addr_full_to_string(dns[j]);
|
|
if (!str)
|
|
continue;
|
|
|
|
if (*space)
|
|
fputc(' ', f);
|
|
fputs(str, f);
|
|
*space = true;
|
|
}
|
|
}
|
|
|
|
static void serialize_addresses(
|
|
FILE *f,
|
|
const char *lvalue,
|
|
bool *space,
|
|
char **addresses,
|
|
sd_dhcp_lease *lease,
|
|
bool conditional,
|
|
sd_dhcp_lease_server_type what,
|
|
sd_dhcp6_lease *lease6,
|
|
bool conditional6,
|
|
int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
|
|
int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
|
|
int r;
|
|
|
|
bool _space = false;
|
|
if (!space)
|
|
space = &_space;
|
|
|
|
if (lvalue)
|
|
fprintf(f, "%s=", lvalue);
|
|
fputstrv(f, addresses, NULL, space);
|
|
|
|
if (lease && conditional) {
|
|
const struct in_addr *lease_addresses;
|
|
|
|
r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
|
|
if (r > 0)
|
|
serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
|
|
}
|
|
|
|
if (lease6 && conditional6 && lease6_get_addr) {
|
|
const struct in6_addr *in6_addrs;
|
|
|
|
r = lease6_get_addr(lease6, &in6_addrs);
|
|
if (r > 0)
|
|
serialize_in6_addrs(f, in6_addrs, r, space);
|
|
}
|
|
|
|
if (lease6 && conditional6 && lease6_get_fqdn) {
|
|
char **in6_hosts;
|
|
|
|
r = lease6_get_fqdn(lease6, &in6_hosts);
|
|
if (r > 0)
|
|
fputstrv(f, in6_hosts, NULL, space);
|
|
}
|
|
|
|
if (lvalue)
|
|
fputc('\n', f);
|
|
}
|
|
|
|
int link_save(Link *link) {
|
|
const char *admin_state, *oper_state, *carrier_state, *address_state;
|
|
_cleanup_free_ char *temp_path = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->state_file);
|
|
assert(link->lease_file);
|
|
assert(link->manager);
|
|
|
|
if (link->state == LINK_STATE_LINGER) {
|
|
(void) unlink(link->state_file);
|
|
return 0;
|
|
}
|
|
|
|
link_lldp_save(link);
|
|
|
|
admin_state = link_state_to_string(link->state);
|
|
assert(admin_state);
|
|
|
|
oper_state = link_operstate_to_string(link->operstate);
|
|
assert(oper_state);
|
|
|
|
carrier_state = link_carrier_state_to_string(link->carrier_state);
|
|
assert(carrier_state);
|
|
|
|
address_state = link_address_state_to_string(link->address_state);
|
|
assert(address_state);
|
|
|
|
r = fopen_temporary(link->state_file, &f, &temp_path);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
(void) fchmod(fileno(f), 0644);
|
|
|
|
fprintf(f,
|
|
"# This is private data. Do not parse.\n"
|
|
"ADMIN_STATE=%s\n"
|
|
"OPER_STATE=%s\n"
|
|
"CARRIER_STATE=%s\n"
|
|
"ADDRESS_STATE=%s\n",
|
|
admin_state, oper_state, carrier_state, address_state);
|
|
|
|
if (link->network) {
|
|
char **dhcp6_domains = NULL, **dhcp_domains = NULL;
|
|
const char *dhcp_domainname = NULL, *p;
|
|
bool space;
|
|
|
|
fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
|
|
yes_no(link->network->required_for_online));
|
|
|
|
LinkOperationalStateRange st = link->network->required_operstate_for_online;
|
|
fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
|
|
strempty(link_operstate_to_string(st.min)),
|
|
st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
|
|
st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
|
|
|
|
fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
|
|
|
|
/************************************************************/
|
|
|
|
fputs("DNS=", f);
|
|
space = false;
|
|
if (link->n_dns != (unsigned) -1)
|
|
link_save_dns(link, f, link->dns, link->n_dns, &space);
|
|
else
|
|
link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
|
|
|
|
serialize_addresses(f, NULL, &space,
|
|
NULL,
|
|
link->dhcp_lease,
|
|
link->network->dhcp_use_dns,
|
|
SD_DHCP_LEASE_DNS,
|
|
link->dhcp6_lease,
|
|
link->network->dhcp6_use_dns,
|
|
sd_dhcp6_lease_get_dns,
|
|
NULL);
|
|
|
|
/* Make sure to flush out old entries before we use the NDisc data */
|
|
ndisc_vacuum(link);
|
|
|
|
if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
|
|
NDiscRDNSS *dd;
|
|
|
|
SET_FOREACH(dd, link->ndisc_rdnss)
|
|
serialize_in6_addrs(f, &dd->address, 1, &space);
|
|
}
|
|
|
|
fputc('\n', f);
|
|
|
|
/************************************************************/
|
|
|
|
serialize_addresses(f, "NTP", NULL,
|
|
link->ntp ?: link->network->ntp,
|
|
link->dhcp_lease,
|
|
link->network->dhcp_use_ntp,
|
|
SD_DHCP_LEASE_NTP,
|
|
link->dhcp6_lease,
|
|
link->network->dhcp6_use_ntp,
|
|
sd_dhcp6_lease_get_ntp_addrs,
|
|
sd_dhcp6_lease_get_ntp_fqdn);
|
|
|
|
serialize_addresses(f, "SIP", NULL,
|
|
NULL,
|
|
link->dhcp_lease,
|
|
link->network->dhcp_use_sip,
|
|
SD_DHCP_LEASE_SIP,
|
|
NULL, false, NULL, NULL);
|
|
|
|
/************************************************************/
|
|
|
|
if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
|
|
if (link->dhcp_lease) {
|
|
(void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
|
|
(void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
|
|
}
|
|
if (link->dhcp6_lease)
|
|
(void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
|
|
}
|
|
|
|
fputs("DOMAINS=", f);
|
|
space = false;
|
|
ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
|
|
fputs_with_space(f, p, NULL, &space);
|
|
|
|
if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
|
|
if (dhcp_domainname)
|
|
fputs_with_space(f, dhcp_domainname, NULL, &space);
|
|
if (dhcp_domains)
|
|
fputstrv(f, dhcp_domains, NULL, &space);
|
|
if (dhcp6_domains)
|
|
fputstrv(f, dhcp6_domains, NULL, &space);
|
|
}
|
|
|
|
if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
|
|
NDiscDNSSL *dd;
|
|
|
|
SET_FOREACH(dd, link->ndisc_dnssl)
|
|
fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
|
|
}
|
|
|
|
fputc('\n', f);
|
|
|
|
/************************************************************/
|
|
|
|
fputs("ROUTE_DOMAINS=", f);
|
|
space = false;
|
|
ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
|
|
fputs_with_space(f, p, NULL, &space);
|
|
|
|
if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
|
|
if (dhcp_domainname)
|
|
fputs_with_space(f, dhcp_domainname, NULL, &space);
|
|
if (dhcp_domains)
|
|
fputstrv(f, dhcp_domains, NULL, &space);
|
|
if (dhcp6_domains)
|
|
fputstrv(f, dhcp6_domains, NULL, &space);
|
|
}
|
|
|
|
if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
|
|
NDiscDNSSL *dd;
|
|
|
|
SET_FOREACH(dd, link->ndisc_dnssl)
|
|
fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
|
|
}
|
|
|
|
fputc('\n', f);
|
|
|
|
/************************************************************/
|
|
|
|
fprintf(f, "LLMNR=%s\n",
|
|
resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
|
|
|
|
/************************************************************/
|
|
|
|
fprintf(f, "MDNS=%s\n",
|
|
resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
|
|
|
|
/************************************************************/
|
|
|
|
int dns_default_route =
|
|
link->dns_default_route >= 0 ? link->dns_default_route :
|
|
link->network->dns_default_route;
|
|
if (dns_default_route >= 0)
|
|
fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
|
|
|
|
/************************************************************/
|
|
|
|
DnsOverTlsMode dns_over_tls_mode =
|
|
link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
|
|
link->network->dns_over_tls_mode;
|
|
if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
|
|
fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
|
|
|
|
/************************************************************/
|
|
|
|
DnssecMode dnssec_mode =
|
|
link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
|
|
link->network->dnssec_mode;
|
|
if (dnssec_mode != _DNSSEC_MODE_INVALID)
|
|
fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
|
|
|
|
/************************************************************/
|
|
|
|
Set *nta_anchors = link->dnssec_negative_trust_anchors;
|
|
if (set_isempty(nta_anchors))
|
|
nta_anchors = link->network->dnssec_negative_trust_anchors;
|
|
|
|
if (!set_isempty(nta_anchors)) {
|
|
const char *n;
|
|
|
|
fputs("DNSSEC_NTA=", f);
|
|
space = false;
|
|
SET_FOREACH(n, nta_anchors)
|
|
fputs_with_space(f, n, NULL, &space);
|
|
fputc('\n', f);
|
|
}
|
|
|
|
/************************************************************/
|
|
|
|
r = link_serialize_addresses(link, f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
/************************************************************/
|
|
|
|
r = link_serialize_routes(link, f);
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
|
|
print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
|
|
|
|
if (link->dhcp_lease) {
|
|
r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
fprintf(f,
|
|
"DHCP_LEASE=%s\n",
|
|
link->lease_file);
|
|
} else
|
|
(void) unlink(link->lease_file);
|
|
|
|
r = link_serialize_ipv4ll(link, f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = link_serialize_dhcp6_client(link, f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = fflush_and_check(f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (rename(temp_path, link->state_file) < 0) {
|
|
r = -errno;
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
(void) unlink(link->state_file);
|
|
if (temp_path)
|
|
(void) unlink(temp_path);
|
|
|
|
return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
|
|
}
|
|
|
|
/* The serialized state in /run is no longer up-to-date. */
|
|
void link_dirty(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
/* mark manager dirty as link is dirty */
|
|
manager_dirty(link->manager);
|
|
|
|
r = set_ensure_put(&link->manager->dirty_links, NULL, link);
|
|
if (r <= 0)
|
|
/* Ignore allocation errors and don't take another ref if the link was already dirty */
|
|
return;
|
|
link_ref(link);
|
|
}
|
|
|
|
/* The serialized state in /run is up-to-date */
|
|
void link_clean(Link *link) {
|
|
assert(link);
|
|
assert(link->manager);
|
|
|
|
link_unref(set_remove(link->manager->dirty_links, link));
|
|
}
|
|
|
|
int link_save_and_clean(Link *link) {
|
|
int r;
|
|
|
|
r = link_save(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
link_clean(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 log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
|
|
const char *err_msg = NULL;
|
|
|
|
(void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
|
|
return log_link_full_errno(link, level, err,
|
|
"%s: %s%s%s%m",
|
|
msg,
|
|
strempty(err_msg),
|
|
err_msg && !endswith(err_msg, ".") ? "." : "",
|
|
err_msg ? " " : "");
|
|
}
|