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2a3cca04c4
The remaining message is changed, because the user would most likely not understand that "append VLANs" is just talking about the netlink message.
1279 lines
47 KiB
C
1279 lines
47 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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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_bridge.h>
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#include "missing_network.h"
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#include "netif-util.h"
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#include "netlink-util.h"
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#include "networkd-address.h"
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#include "networkd-can.h"
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#include "networkd-link.h"
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#include "networkd-manager.h"
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#include "networkd-queue.h"
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#include "networkd-setlink.h"
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#include "string-table.h"
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static const char *const set_link_operation_table[_SET_LINK_OPERATION_MAX] = {
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[SET_LINK_ADDRESS_GENERATION_MODE] = "IPv6LL address generation mode",
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[SET_LINK_BOND] = "bond configurations",
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[SET_LINK_BRIDGE] = "bridge configurations",
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[SET_LINK_BRIDGE_VLAN] = "bridge VLAN configurations",
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[SET_LINK_CAN] = "CAN interface configurations",
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[SET_LINK_FLAGS] = "link flags",
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[SET_LINK_GROUP] = "interface group",
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[SET_LINK_IPOIB] = "IPoIB configurations",
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[SET_LINK_MAC] = "MAC address",
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[SET_LINK_MASTER] = "master interface",
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[SET_LINK_MTU] = "MTU",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(set_link_operation, SetLinkOperation);
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static int get_link_default_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return link_getlink_handler_internal(rtnl, m, link, "Failed to sync link information");
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}
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static int get_link_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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if (get_link_default_handler(rtnl, m, link) > 0)
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link->master_set = true;
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return 0;
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}
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static int get_link_update_flag_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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assert(link);
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assert(link->set_flags_messages > 0);
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link->set_flags_messages--;
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return get_link_default_handler(rtnl, m, link);
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}
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static int set_link_handler_internal(
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sd_netlink *rtnl,
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sd_netlink_message *m,
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Link *link,
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SetLinkOperation op,
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bool ignore,
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link_netlink_message_handler_t get_link_handler) {
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int r;
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assert(m);
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assert(link);
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assert(link->set_link_messages > 0);
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assert(op >= 0 && op < _SET_LINK_OPERATION_MAX);
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link->set_link_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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goto on_error;
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r = sd_netlink_message_get_errno(m);
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if (r < 0) {
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const char *error_msg;
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error_msg = strjoina("Failed to set ", set_link_operation_to_string(op), ignore ? ", ignoring" : "");
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log_link_message_warning_errno(link, m, r, error_msg);
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if (!ignore)
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link_enter_failed(link);
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goto on_error;
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}
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log_link_debug(link, "%s set.", set_link_operation_to_string(op));
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if (get_link_handler) {
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r = link_call_getlink(link, get_link_handler);
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if (r < 0) {
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link_enter_failed(link);
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goto on_error;
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}
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}
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if (link->set_link_messages == 0)
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link_check_ready(link);
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return 1;
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on_error:
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switch (op) {
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case SET_LINK_FLAGS:
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assert(link->set_flags_messages > 0);
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link->set_flags_messages--;
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break;
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case SET_LINK_MASTER:
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link->master_set = true;
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break;
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default:
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break;
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}
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return 0;
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}
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static int link_set_addrgen_mode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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r = set_link_handler_internal(rtnl, m, link, SET_LINK_ADDRESS_GENERATION_MODE, /* ignore = */ true, NULL);
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if (r <= 0)
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return r;
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r = link_drop_ipv6ll_addresses(link);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to drop IPv6LL addresses: %m");
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link_enter_failed(link);
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}
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return 0;
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}
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static int link_set_bond_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_BOND, /* ignore = */ false, NULL);
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}
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static int link_set_bridge_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_BRIDGE, /* ignore = */ true, NULL);
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}
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static int link_set_bridge_vlan_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_BRIDGE_VLAN, /* ignore = */ false, NULL);
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}
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static int link_set_can_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_CAN, /* ignore = */ false, NULL);
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}
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static int link_set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_FLAGS, /* ignore = */ false, get_link_update_flag_handler);
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}
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static int link_set_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_GROUP, /* ignore = */ false, NULL);
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}
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static int link_set_ipoib_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_IPOIB, /* ignore = */ true, NULL);
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}
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static int link_set_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_MAC, /* ignore = */ true, get_link_default_handler);
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}
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static int link_set_mac_allow_retry_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(m);
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assert(link);
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assert(link->set_link_messages > 0);
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link->set_link_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 0;
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r = sd_netlink_message_get_errno(m);
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if (r == -EBUSY) {
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/* Most real network devices refuse to set its hardware address with -EBUSY when its
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* operstate is not down. See, eth_prepare_mac_addr_change() in net/ethernet/eth.c
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* of kernel. */
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log_link_message_debug_errno(link, m, r, "Failed to set MAC address, retrying again: %m");
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r = link_request_to_set_mac(link, /* allow_retry = */ false);
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if (r < 0)
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link_enter_failed(link);
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return 0;
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}
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/* set_link_mac_handler() also decrements set_link_messages, so increment the value once. */
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link->set_link_messages++;
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return link_set_mac_handler(rtnl, m, link);
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}
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static int link_set_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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return set_link_handler_internal(rtnl, m, link, SET_LINK_MASTER, /* ignore = */ false, get_link_master_handler);
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}
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static int link_unset_master_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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/* Some devices do not support setting master ifindex. Let's ignore error on unsetting master ifindex. */
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return set_link_handler_internal(rtnl, m, link, SET_LINK_MASTER, /* ignore = */ true, get_link_master_handler);
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}
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static int link_set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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r = set_link_handler_internal(rtnl, m, link, SET_LINK_MTU, /* ignore = */ true, get_link_default_handler);
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if (r <= 0)
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return r;
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/* The kernel resets ipv6 mtu after changing device mtu;
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* we must set this here, after we've set device mtu */
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r = link_set_ipv6_mtu(link);
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if (r < 0)
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log_link_warning_errno(link, r, "Failed to set IPv6 MTU, ignoring: %m");
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return 0;
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}
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static int link_configure(
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Link *link,
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SetLinkOperation op,
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void *userdata,
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link_netlink_message_handler_t callback) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
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int r;
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assert(link);
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assert(link->manager);
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assert(link->manager->rtnl);
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assert(link->network);
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assert(op >= 0 && op < _SET_LINK_OPERATION_MAX);
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assert(callback);
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log_link_debug(link, "Setting %s", set_link_operation_to_string(op));
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if (op == SET_LINK_BOND) {
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r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->master_ifindex);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not allocate RTM_NEWLINK message: %m");
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} else if (IN_SET(op, SET_LINK_CAN, SET_LINK_IPOIB)) {
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r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_NEWLINK, link->ifindex);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not allocate RTM_NEWLINK message: %m");
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} else {
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r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
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}
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switch (op) {
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case SET_LINK_ADDRESS_GENERATION_MODE:
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r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
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r = sd_netlink_message_open_container(req, AF_INET6);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not open AF_INET6 container: %m");
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r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, PTR_TO_UINT8(userdata));
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE attribute: %m");
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r = sd_netlink_message_close_container(req);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not close AF_INET6 container: %m");
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r = sd_netlink_message_close_container(req);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
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break;
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case SET_LINK_BOND:
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r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not set netlink message flags: %m");
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r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not open IFLA_LINKINFO container: %m");
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r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, "bond");
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not open IFLA_INFO_DATA container: %m");
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if (link->network->active_slave) {
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r = sd_netlink_message_append_u32(req, IFLA_BOND_ACTIVE_SLAVE, link->ifindex);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BOND_ACTIVE_SLAVE attribute: %m");
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}
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if (link->network->primary_slave) {
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r = sd_netlink_message_append_u32(req, IFLA_BOND_PRIMARY, link->ifindex);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BOND_PRIMARY attribute: %m");
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}
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r = sd_netlink_message_close_container(req);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not close IFLA_INFO_DATA container: %m");
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r = sd_netlink_message_close_container(req);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not close IFLA_LINKINFO container: %m");
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break;
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case SET_LINK_BRIDGE:
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r = sd_rtnl_message_link_set_family(req, AF_BRIDGE);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not set message family: %m");
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r = sd_netlink_message_open_container(req, IFLA_PROTINFO);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not open IFLA_PROTINFO container: %m");
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if (link->network->use_bpdu >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_GUARD, link->network->use_bpdu);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_GUARD attribute: %m");
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}
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if (link->network->hairpin >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MODE, link->network->hairpin);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_MODE attribute: %m");
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}
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if (link->network->fast_leave >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_FAST_LEAVE, link->network->fast_leave);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_FAST_LEAVE attribute: %m");
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}
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if (link->network->allow_port_to_be_root >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROTECT, link->network->allow_port_to_be_root);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_PROTECT attribute: %m");
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}
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if (link->network->unicast_flood >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_UNICAST_FLOOD, link->network->unicast_flood);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_UNICAST_FLOOD attribute: %m");
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}
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if (link->network->multicast_flood >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_FLOOD, link->network->multicast_flood);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_MCAST_FLOOD attribute: %m");
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}
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if (link->network->multicast_to_unicast >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MCAST_TO_UCAST, link->network->multicast_to_unicast);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_MCAST_TO_UCAST attribute: %m");
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}
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if (link->network->neighbor_suppression >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_NEIGH_SUPPRESS, link->network->neighbor_suppression);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_NEIGH_SUPPRESS attribute: %m");
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}
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if (link->network->learning >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_LEARNING, link->network->learning);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_LEARNING attribute: %m");
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}
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if (link->network->bridge_proxy_arp >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP, link->network->bridge_proxy_arp);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP attribute: %m");
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}
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if (link->network->bridge_proxy_arp_wifi >= 0) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_PROXYARP_WIFI, link->network->bridge_proxy_arp_wifi);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_PROXYARP_WIFI attribute: %m");
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}
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if (link->network->cost != 0) {
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r = sd_netlink_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_COST attribute: %m");
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}
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if (link->network->priority != LINK_BRIDGE_PORT_PRIORITY_INVALID) {
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r = sd_netlink_message_append_u16(req, IFLA_BRPORT_PRIORITY, link->network->priority);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_PRIORITY attribute: %m");
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}
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if (link->network->multicast_router != _MULTICAST_ROUTER_INVALID) {
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r = sd_netlink_message_append_u8(req, IFLA_BRPORT_MULTICAST_ROUTER, link->network->multicast_router);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not append IFLA_BRPORT_MULTICAST_ROUTER attribute: %m");
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}
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r = sd_netlink_message_close_container(req);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not close IFLA_PROTINFO container: %m");
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break;
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case SET_LINK_BRIDGE_VLAN:
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r = sd_rtnl_message_link_set_family(req, AF_BRIDGE);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not set message family: %m");
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|
|
|
r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
|
|
|
|
if (link->master_ifindex <= 0) {
|
|
/* master needs BRIDGE_FLAGS_SELF flag */
|
|
r = sd_netlink_message_append_u16(req, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append IFLA_BRIDGE_FLAGS attribute: %m");
|
|
}
|
|
|
|
r = bridge_vlan_append_info(link, req, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append VLAN information to netlink message: %m");
|
|
|
|
r = sd_netlink_message_close_container(req);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
|
|
|
|
break;
|
|
case SET_LINK_CAN:
|
|
r = can_set_netlink_message(link, req);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
case SET_LINK_FLAGS: {
|
|
unsigned ifi_change = 0, ifi_flags = 0;
|
|
|
|
if (link->network->arp >= 0) {
|
|
ifi_change |= IFF_NOARP;
|
|
SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
|
|
}
|
|
|
|
if (link->network->multicast >= 0) {
|
|
ifi_change |= IFF_MULTICAST;
|
|
SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
|
|
}
|
|
|
|
if (link->network->allmulticast >= 0) {
|
|
ifi_change |= IFF_ALLMULTI;
|
|
SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
|
|
}
|
|
|
|
if (link->network->promiscuous >= 0) {
|
|
ifi_change |= IFF_PROMISC;
|
|
SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
|
|
}
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not set link flags: %m");
|
|
|
|
break;
|
|
}
|
|
case SET_LINK_GROUP:
|
|
r = sd_netlink_message_append_u32(req, IFLA_GROUP, (uint32_t) link->network->group);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append IFLA_GROUP attribute: %m");
|
|
break;
|
|
case SET_LINK_MAC:
|
|
r = netlink_message_append_hw_addr(req, IFLA_ADDRESS, &link->requested_hw_addr);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append IFLA_ADDRESS attribute: %m");
|
|
break;
|
|
case SET_LINK_IPOIB:
|
|
r = ipoib_set_netlink_message(link, req);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not create netlink message: %m");
|
|
break;
|
|
case SET_LINK_MASTER:
|
|
r = sd_netlink_message_append_u32(req, IFLA_MASTER, PTR_TO_UINT32(userdata));
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
|
|
break;
|
|
case SET_LINK_MTU:
|
|
r = sd_netlink_message_append_u32(req, IFLA_MTU, PTR_TO_UINT32(userdata));
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not append IFLA_MTU attribute: %m");
|
|
break;
|
|
default:
|
|
assert_not_reached();
|
|
}
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not send RTM_SETLINK message: %m");
|
|
|
|
link_ref(link);
|
|
return 0;
|
|
}
|
|
|
|
static bool netdev_is_ready(NetDev *netdev) {
|
|
assert(netdev);
|
|
|
|
if (netdev->state != NETDEV_STATE_READY)
|
|
return false;
|
|
if (netdev->ifindex == 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool link_is_ready_to_call_set_link(Request *req) {
|
|
SetLinkOperation op;
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(req);
|
|
assert(req->link);
|
|
assert(req->link->manager);
|
|
assert(req->link->network);
|
|
|
|
link = req->link;
|
|
op = PTR_TO_INT(req->set_link_operation_ptr);
|
|
|
|
if (!IN_SET(link->state, LINK_STATE_INITIALIZED, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
|
|
return false;
|
|
|
|
switch (op) {
|
|
case SET_LINK_BOND:
|
|
case SET_LINK_BRIDGE:
|
|
if (!link->master_set)
|
|
return false;
|
|
if (link->network->keep_master && link->master_ifindex <= 0)
|
|
return false;
|
|
break;
|
|
case SET_LINK_BRIDGE_VLAN:
|
|
if (!link->master_set)
|
|
return false;
|
|
if (link->network->keep_master && link->master_ifindex <= 0 && !streq_ptr(link->kind, "bridge"))
|
|
return false;
|
|
break;
|
|
case SET_LINK_CAN:
|
|
/* Do not check link->set_flgas_messages here, as it is ok even if link->flags
|
|
* is outdated, and checking the counter causes a deadlock. */
|
|
if (FLAGS_SET(link->flags, IFF_UP)) {
|
|
/* The CAN interface must be down to configure bitrate, etc... */
|
|
r = link_down(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
case SET_LINK_MAC:
|
|
if (req->netlink_handler == link_set_mac_handler) {
|
|
/* This is the second attempt to set hardware address. On the first attempt
|
|
* req->netlink_handler points to link_set_mac_allow_retry_handler().
|
|
* The first attempt failed as the interface was up. */
|
|
r = link_down(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
case SET_LINK_MASTER: {
|
|
uint32_t m = 0;
|
|
Request req_mac = {
|
|
.link = link,
|
|
.type = REQUEST_TYPE_SET_LINK,
|
|
.set_link_operation_ptr = INT_TO_PTR(SET_LINK_MAC),
|
|
};
|
|
|
|
if (link->network->batadv) {
|
|
if (!netdev_is_ready(link->network->batadv))
|
|
return false;
|
|
m = link->network->batadv->ifindex;
|
|
} else if (link->network->bond) {
|
|
if (ordered_set_contains(link->manager->request_queue, &req_mac))
|
|
return false;
|
|
if (!netdev_is_ready(link->network->bond))
|
|
return false;
|
|
m = link->network->bond->ifindex;
|
|
|
|
/* Do not check link->set_flgas_messages here, as it is ok even if link->flags
|
|
* is outdated, and checking the counter causes a deadlock. */
|
|
if (FLAGS_SET(link->flags, IFF_UP)) {
|
|
/* link must be down when joining to bond master. */
|
|
r = link_down(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return false;
|
|
}
|
|
}
|
|
} else if (link->network->bridge) {
|
|
if (ordered_set_contains(link->manager->request_queue, &req_mac))
|
|
return false;
|
|
if (!netdev_is_ready(link->network->bridge))
|
|
return false;
|
|
m = link->network->bridge->ifindex;
|
|
} else if (link->network->vrf) {
|
|
if (!netdev_is_ready(link->network->vrf))
|
|
return false;
|
|
m = link->network->vrf->ifindex;
|
|
}
|
|
|
|
req->userdata = UINT32_TO_PTR(m);
|
|
break;
|
|
}
|
|
case SET_LINK_MTU: {
|
|
Request req_ipoib = {
|
|
.link = link,
|
|
.type = REQUEST_TYPE_SET_LINK,
|
|
.set_link_operation_ptr = INT_TO_PTR(SET_LINK_IPOIB),
|
|
};
|
|
|
|
return !ordered_set_contains(link->manager->request_queue, &req_ipoib);
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int request_process_set_link(Request *req) {
|
|
SetLinkOperation op;
|
|
int r;
|
|
|
|
assert(req);
|
|
assert(req->link);
|
|
assert(req->type == REQUEST_TYPE_SET_LINK);
|
|
assert(req->netlink_handler);
|
|
|
|
op = PTR_TO_INT(req->set_link_operation_ptr);
|
|
|
|
assert(op >= 0 && op < _SET_LINK_OPERATION_MAX);
|
|
|
|
if (!link_is_ready_to_call_set_link(req))
|
|
return 0;
|
|
|
|
r = link_configure(req->link, op, req->userdata, req->netlink_handler);
|
|
if (r < 0)
|
|
return log_link_error_errno(req->link, r, "Failed to set %s: %m",
|
|
set_link_operation_to_string(op));
|
|
|
|
if (op == SET_LINK_FLAGS)
|
|
req->link->set_flags_messages++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_request_set_link(
|
|
Link *link,
|
|
SetLinkOperation op,
|
|
link_netlink_message_handler_t netlink_handler,
|
|
Request **ret) {
|
|
|
|
Request *req;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(op >= 0 && op < _SET_LINK_OPERATION_MAX);
|
|
assert(netlink_handler);
|
|
|
|
r = link_queue_request(link, REQUEST_TYPE_SET_LINK, INT_TO_PTR(op), false,
|
|
&link->set_link_messages, netlink_handler, &req);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to request to set %s: %m",
|
|
set_link_operation_to_string(op));
|
|
|
|
log_link_debug(link, "Requested to set %s", set_link_operation_to_string(op));
|
|
|
|
if (ret)
|
|
*ret = req;
|
|
return 0;
|
|
}
|
|
|
|
int link_request_to_set_addrgen_mode(Link *link) {
|
|
Request *req;
|
|
uint8_t mode;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!socket_ipv6_is_supported())
|
|
return 0;
|
|
|
|
if (!link_ipv6ll_enabled(link))
|
|
mode = IN6_ADDR_GEN_MODE_NONE;
|
|
else if (link->network->ipv6ll_address_gen_mode >= 0)
|
|
mode = link->network->ipv6ll_address_gen_mode;
|
|
else if (in6_addr_is_set(&link->network->ipv6ll_stable_secret))
|
|
mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
|
|
else
|
|
mode = IN6_ADDR_GEN_MODE_EUI64;
|
|
|
|
r = link_request_set_link(link, SET_LINK_ADDRESS_GENERATION_MODE, link_set_addrgen_mode_handler, &req);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
req->userdata = UINT8_TO_PTR(mode);
|
|
return 0;
|
|
}
|
|
|
|
int link_request_to_set_bond(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!link->network->bond) {
|
|
Link *master;
|
|
|
|
if (!link->network->keep_master)
|
|
return 0;
|
|
|
|
if (link_get_master(link, &master) < 0)
|
|
return 0;
|
|
|
|
if (!streq_ptr(master->kind, "bond"))
|
|
return 0;
|
|
}
|
|
|
|
return link_request_set_link(link, SET_LINK_BOND, link_set_bond_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_bridge(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!link->network->bridge) {
|
|
Link *master;
|
|
|
|
if (!link->network->keep_master)
|
|
return 0;
|
|
|
|
if (link_get_master(link, &master) < 0)
|
|
return 0;
|
|
|
|
if (!streq_ptr(master->kind, "bridge"))
|
|
return 0;
|
|
}
|
|
|
|
return link_request_set_link(link, SET_LINK_BRIDGE, link_set_bridge_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_bridge_vlan(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!link->network->use_br_vlan)
|
|
return 0;
|
|
|
|
if (!link->network->bridge && !streq_ptr(link->kind, "bridge")) {
|
|
Link *master;
|
|
|
|
if (!link->network->keep_master)
|
|
return 0;
|
|
|
|
if (link_get_master(link, &master) < 0)
|
|
return 0;
|
|
|
|
if (!streq_ptr(master->kind, "bridge"))
|
|
return 0;
|
|
}
|
|
|
|
return link_request_set_link(link, SET_LINK_BRIDGE_VLAN, link_set_bridge_vlan_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_can(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->iftype != ARPHRD_CAN)
|
|
return 0;
|
|
|
|
if (!streq_ptr(link->kind, "can"))
|
|
return 0;
|
|
|
|
return link_request_set_link(link, SET_LINK_CAN, link_set_can_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_flags(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->arp < 0 &&
|
|
link->network->multicast < 0 &&
|
|
link->network->allmulticast < 0 &&
|
|
link->network->promiscuous < 0)
|
|
return 0;
|
|
|
|
return link_request_set_link(link, SET_LINK_FLAGS, link_set_flags_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_group(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->group < 0)
|
|
return 0;
|
|
|
|
return link_request_set_link(link, SET_LINK_GROUP, link_set_group_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_mac(Link *link, bool allow_retry) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->hw_addr.length == 0)
|
|
return 0;
|
|
|
|
link->requested_hw_addr = link->network->hw_addr;
|
|
r = net_verify_hardware_address(link->ifname, /* is_static = */ true,
|
|
link->iftype, &link->hw_addr, &link->requested_hw_addr);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (hw_addr_equal(&link->hw_addr, &link->requested_hw_addr))
|
|
return 0;
|
|
|
|
return link_request_set_link(link, SET_LINK_MAC,
|
|
allow_retry ? link_set_mac_allow_retry_handler : link_set_mac_handler,
|
|
NULL);
|
|
}
|
|
|
|
int link_request_to_set_ipoib(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->iftype != ARPHRD_INFINIBAND)
|
|
return 0;
|
|
|
|
if (link->network->ipoib_mode < 0 &&
|
|
link->network->ipoib_umcast < 0)
|
|
return 0;
|
|
|
|
return link_request_set_link(link, SET_LINK_IPOIB, link_set_ipoib_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_master(Link *link) {
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->keep_master) {
|
|
link->master_set = true;
|
|
return 0;
|
|
}
|
|
|
|
link->master_set = false;
|
|
|
|
if (link->network->batadv || link->network->bond || link->network->bridge || link->network->vrf)
|
|
return link_request_set_link(link, SET_LINK_MASTER, link_set_master_handler, NULL);
|
|
else
|
|
return link_request_set_link(link, SET_LINK_MASTER, link_unset_master_handler, NULL);
|
|
}
|
|
|
|
int link_request_to_set_mtu(Link *link, uint32_t mtu) {
|
|
Request *req;
|
|
const char *origin;
|
|
uint32_t min_mtu;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
min_mtu = link->min_mtu;
|
|
origin = "the minimum MTU of the interface";
|
|
if (link_ipv6_enabled(link)) {
|
|
/* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes on the interface. Bump up
|
|
* MTU bytes to IPV6_MTU_MIN. */
|
|
if (min_mtu < IPV6_MIN_MTU) {
|
|
min_mtu = IPV6_MIN_MTU;
|
|
origin = "the minimum IPv6 MTU";
|
|
}
|
|
if (min_mtu < link->network->ipv6_mtu) {
|
|
min_mtu = link->network->ipv6_mtu;
|
|
origin = "the requested IPv6 MTU in IPv6MTUBytes=";
|
|
}
|
|
}
|
|
|
|
if (mtu < min_mtu) {
|
|
log_link_warning(link, "Bumping the requested MTU %"PRIu32" to %s (%"PRIu32")",
|
|
mtu, origin, min_mtu);
|
|
mtu = min_mtu;
|
|
}
|
|
|
|
if (mtu > link->max_mtu) {
|
|
log_link_warning(link, "Reducing the requested MTU %"PRIu32" to the interface's maximum MTU %"PRIu32".",
|
|
mtu, link->max_mtu);
|
|
mtu = link->max_mtu;
|
|
}
|
|
|
|
if (link->mtu == mtu)
|
|
return 0;
|
|
|
|
r = link_request_set_link(link, SET_LINK_MTU, link_set_mtu_handler, &req);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
req->userdata = UINT32_TO_PTR(mtu);
|
|
return 0;
|
|
}
|
|
|
|
static bool link_reduces_vlan_mtu(Link *link) {
|
|
/* See netif_reduces_vlan_mtu() in kernel. */
|
|
return streq_ptr(link->kind, "macsec");
|
|
}
|
|
|
|
static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
|
|
uint32_t mtu = 0;
|
|
NetDev *dev;
|
|
|
|
HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
|
|
if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
|
|
/* See vlan_dev_change_mtu() in kernel. */
|
|
mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
|
|
|
|
else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
|
|
/* See macvlan_change_mtu() in kernel. */
|
|
mtu = dev->mtu;
|
|
|
|
return mtu;
|
|
}
|
|
|
|
int link_configure_mtu(Link *link) {
|
|
uint32_t mtu;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->network->mtu > 0)
|
|
return link_request_to_set_mtu(link, link->network->mtu);
|
|
|
|
mtu = link_get_requested_mtu_by_stacked_netdevs(link);
|
|
if (link->mtu >= mtu)
|
|
return 0;
|
|
|
|
log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
|
|
"If it is not desired, then please explicitly specify MTUBytes= setting.",
|
|
link->mtu, mtu);
|
|
|
|
return link_request_to_set_mtu(link, mtu);
|
|
}
|
|
|
|
static int link_up_dsa_slave(Link *link) {
|
|
Link *master;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
/* For older kernels (specifically, older than 9d5ef190e5615a7b63af89f88c4106a5bc127974, kernel-5.12),
|
|
* it is necessary to bring up a DSA slave that its master interface is already up. And bringing up
|
|
* the slave fails with -ENETDOWN. So, let's bring up the master even if it is not managed by us,
|
|
* and try to bring up the slave after the master becomes up. */
|
|
|
|
if (link->dsa_master_ifindex <= 0)
|
|
return 0;
|
|
|
|
if (!streq_ptr(link->driver, "dsa"))
|
|
return 0;
|
|
|
|
if (link_get_by_index(link->manager, link->dsa_master_ifindex, &master) < 0)
|
|
return 0;
|
|
|
|
if (master->state == LINK_STATE_UNMANAGED) {
|
|
/* If the DSA master interface is unmanaged, then it will never become up.
|
|
* Let's request to bring up the master. */
|
|
r = link_request_to_bring_up_or_down(master, /* up = */ true);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = link_request_to_bring_up_or_down(link, /* up = */ true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link_up_or_down_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool up, bool on_activate) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
goto on_error;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r == -ENETDOWN && up && link_up_dsa_slave(link) > 0)
|
|
log_link_message_debug_errno(link, m, r, "Could not bring up dsa slave, retrying again after dsa master becomes up");
|
|
else if (r < 0) {
|
|
const char *error_msg;
|
|
|
|
error_msg = up ?
|
|
(on_activate ? "Could not bring up interface" : "Could not bring up interface, ignoring") :
|
|
(on_activate ? "Could not bring down interface" : "Could not bring down interface, ignoring");
|
|
|
|
log_link_message_warning_errno(link, m, r, error_msg);
|
|
if (on_activate)
|
|
goto on_error;
|
|
}
|
|
|
|
r = link_call_getlink(link, get_link_update_flag_handler);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
goto on_error;
|
|
}
|
|
|
|
if (on_activate) {
|
|
link->activated = true;
|
|
link_check_ready(link);
|
|
}
|
|
|
|
return 1;
|
|
|
|
on_error:
|
|
assert(link->set_flags_messages > 0);
|
|
link->set_flags_messages--;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int link_activate_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
return link_up_or_down_handler_internal(rtnl, m, link, /* up = */ true, /* on_activate = */ true);
|
|
}
|
|
|
|
static int link_activate_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
return link_up_or_down_handler_internal(rtnl, m, link, /* up = */ false, /* on_activate = */ true);
|
|
}
|
|
|
|
static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
return link_up_or_down_handler_internal(rtnl, m, link, /* up = */ true, /* on_activate = */ false);
|
|
}
|
|
|
|
static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
return link_up_or_down_handler_internal(rtnl, m, link, /* up = */ false, /* on_activate = */ false);
|
|
}
|
|
|
|
static const char *up_or_down(bool up) {
|
|
return up ? "up" : "down";
|
|
}
|
|
|
|
static int link_up_or_down(Link *link, bool up, link_netlink_message_handler_t callback) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
assert(callback);
|
|
|
|
log_link_debug(link, "Bringing link %s", up_or_down(up));
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, up ? IFF_UP : 0, IFF_UP);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not set link flags: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_down(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
r = link_up_or_down(link, false, link_down_handler);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to bring down interface: %m");
|
|
|
|
link->set_flags_messages++;
|
|
return 0;
|
|
}
|
|
|
|
static bool link_is_ready_to_activate(Link *link) {
|
|
assert(link);
|
|
|
|
if (!IN_SET(link->state, LINK_STATE_INITIALIZED, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
|
|
return false;
|
|
|
|
if (link->set_link_messages > 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int request_process_activation(Request *req) {
|
|
Link *link;
|
|
bool up;
|
|
int r;
|
|
|
|
assert(req);
|
|
assert(req->link);
|
|
assert(req->type == REQUEST_TYPE_ACTIVATE_LINK);
|
|
assert(req->netlink_handler);
|
|
|
|
link = req->link;
|
|
up = PTR_TO_INT(req->userdata);
|
|
|
|
if (!link_is_ready_to_activate(link))
|
|
return 0;
|
|
|
|
r = link_up_or_down(link, up, req->netlink_handler);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to bring %s: %m", up_or_down(up));
|
|
|
|
return 1;
|
|
}
|
|
|
|
int link_request_to_activate(Link *link) {
|
|
Request *req;
|
|
bool up;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
switch (link->network->activation_policy) {
|
|
case ACTIVATION_POLICY_BOUND:
|
|
r = link_handle_bound_to_list(link);
|
|
if (r < 0)
|
|
return r;
|
|
_fallthrough_;
|
|
case ACTIVATION_POLICY_MANUAL:
|
|
link->activated = true;
|
|
link_check_ready(link);
|
|
return 0;
|
|
case ACTIVATION_POLICY_UP:
|
|
case ACTIVATION_POLICY_ALWAYS_UP:
|
|
up = true;
|
|
break;
|
|
case ACTIVATION_POLICY_DOWN:
|
|
case ACTIVATION_POLICY_ALWAYS_DOWN:
|
|
up = false;
|
|
break;
|
|
default:
|
|
assert_not_reached();
|
|
}
|
|
|
|
link->activated = false;
|
|
|
|
r = link_queue_request(link, REQUEST_TYPE_ACTIVATE_LINK, NULL, false, &link->set_flags_messages,
|
|
up ? link_activate_up_handler : link_activate_down_handler, &req);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to request to activate link: %m");
|
|
|
|
req->userdata = INT_TO_PTR(up);
|
|
|
|
log_link_debug(link, "Requested to activate link");
|
|
return 0;
|
|
}
|
|
|
|
static bool link_is_ready_to_bring_up_or_down(Link *link, bool up) {
|
|
assert(link);
|
|
|
|
if (up && link->dsa_master_ifindex > 0) {
|
|
Link *master;
|
|
|
|
/* The master interface must be up. See comments in link_up_dsa_slave(). */
|
|
|
|
if (link_get_by_index(link->manager, link->dsa_master_ifindex, &master) < 0)
|
|
return false;
|
|
|
|
if (!FLAGS_SET(master->flags, IFF_UP))
|
|
return false;
|
|
}
|
|
|
|
if (link->state == LINK_STATE_UNMANAGED)
|
|
return true;
|
|
|
|
if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
|
|
return false;
|
|
|
|
if (link->set_link_messages > 0)
|
|
return false;
|
|
|
|
if (!link->activated)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int request_process_link_up_or_down(Request *req) {
|
|
Link *link;
|
|
bool up;
|
|
int r;
|
|
|
|
assert(req);
|
|
assert(req->link);
|
|
assert(req->type == REQUEST_TYPE_UP_DOWN);
|
|
|
|
link = req->link;
|
|
up = PTR_TO_INT(req->userdata);
|
|
|
|
if (!link_is_ready_to_bring_up_or_down(link, up))
|
|
return 0;
|
|
|
|
r = link_up_or_down(link, up, req->netlink_handler);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to bring %s: %m", up_or_down(up));
|
|
|
|
return 1;
|
|
}
|
|
|
|
int link_request_to_bring_up_or_down(Link *link, bool up) {
|
|
Request *req;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
r = link_queue_request(link, REQUEST_TYPE_UP_DOWN, NULL, false, &link->set_flags_messages,
|
|
up ? link_up_handler : link_down_handler, &req);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to request to bring %s link: %m",
|
|
up_or_down(up));
|
|
|
|
req->userdata = INT_TO_PTR(up);
|
|
|
|
log_link_debug(link, "Requested to bring link %s", up_or_down(up));
|
|
return 0;
|
|
}
|
|
|
|
static int link_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(link);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 0;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0)
|
|
log_link_message_warning_errno(link, m, r, "Could not remove interface, ignoring");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_remove(Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
log_link_debug(link, "Removing link.");
|
|
|
|
r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_DELLINK, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not allocate RTM_DELLINK message: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, link_remove_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_debug_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
return 0;
|
|
}
|