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Systemd/src/network/netdev/netdev.c

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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <net/if.h>
#include "alloc-util.h"
#include "conf-files.h"
#include "conf-parser.h"
#include "fd-util.h"
#include "list.h"
#include "netlink-util.h"
#include "network-internal.h"
#include "netdev/netdev.h"
#include "networkd-manager.h"
#include "networkd-link.h"
#include "siphash24.h"
#include "stat-util.h"
#include "string-table.h"
#include "string-util.h"
#include "netdev/bridge.h"
#include "netdev/bond.h"
#include "netdev/geneve.h"
#include "netdev/vlan.h"
#include "netdev/macvlan.h"
#include "netdev/ipvlan.h"
#include "netdev/vxlan.h"
#include "netdev/tunnel.h"
#include "netdev/tuntap.h"
#include "netdev/veth.h"
#include "netdev/dummy.h"
#include "netdev/vrf.h"
#include "netdev/vcan.h"
#include "netdev/vxcan.h"
#include "netdev/wireguard.h"
const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_BRIDGE] = &bridge_vtable,
[NETDEV_KIND_BOND] = &bond_vtable,
[NETDEV_KIND_VLAN] = &vlan_vtable,
[NETDEV_KIND_MACVLAN] = &macvlan_vtable,
[NETDEV_KIND_MACVTAP] = &macvtap_vtable,
[NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
[NETDEV_KIND_VXLAN] = &vxlan_vtable,
[NETDEV_KIND_IPIP] = &ipip_vtable,
[NETDEV_KIND_GRE] = &gre_vtable,
[NETDEV_KIND_GRETAP] = &gretap_vtable,
[NETDEV_KIND_IP6GRE] = &ip6gre_vtable,
[NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
[NETDEV_KIND_SIT] = &sit_vtable,
[NETDEV_KIND_VTI] = &vti_vtable,
[NETDEV_KIND_VTI6] = &vti6_vtable,
[NETDEV_KIND_VETH] = &veth_vtable,
[NETDEV_KIND_DUMMY] = &dummy_vtable,
[NETDEV_KIND_TUN] = &tun_vtable,
[NETDEV_KIND_TAP] = &tap_vtable,
[NETDEV_KIND_IP6TNL] = &ip6tnl_vtable,
[NETDEV_KIND_VRF] = &vrf_vtable,
[NETDEV_KIND_VCAN] = &vcan_vtable,
[NETDEV_KIND_GENEVE] = &geneve_vtable,
[NETDEV_KIND_VXCAN] = &vxcan_vtable,
[NETDEV_KIND_WIREGUARD] = &wireguard_vtable,
};
static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_BRIDGE] = "bridge",
[NETDEV_KIND_BOND] = "bond",
[NETDEV_KIND_VLAN] = "vlan",
[NETDEV_KIND_MACVLAN] = "macvlan",
[NETDEV_KIND_MACVTAP] = "macvtap",
[NETDEV_KIND_IPVLAN] = "ipvlan",
[NETDEV_KIND_VXLAN] = "vxlan",
[NETDEV_KIND_IPIP] = "ipip",
[NETDEV_KIND_GRE] = "gre",
[NETDEV_KIND_GRETAP] = "gretap",
[NETDEV_KIND_IP6GRE] = "ip6gre",
[NETDEV_KIND_IP6GRETAP] = "ip6gretap",
[NETDEV_KIND_SIT] = "sit",
[NETDEV_KIND_VETH] = "veth",
[NETDEV_KIND_VTI] = "vti",
[NETDEV_KIND_VTI6] = "vti6",
[NETDEV_KIND_DUMMY] = "dummy",
[NETDEV_KIND_TUN] = "tun",
[NETDEV_KIND_TAP] = "tap",
[NETDEV_KIND_IP6TNL] = "ip6tnl",
[NETDEV_KIND_VRF] = "vrf",
[NETDEV_KIND_VCAN] = "vcan",
[NETDEV_KIND_GENEVE] = "geneve",
[NETDEV_KIND_VXCAN] = "vxcan",
[NETDEV_KIND_WIREGUARD] = "wireguard",
};
DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
static void netdev_cancel_callbacks(NetDev *netdev) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
netdev_join_callback *callback;
if (!netdev || !netdev->manager)
return;
rtnl_message_new_synthetic_error(netdev->manager->rtnl, -ENODEV, 0, &m);
while ((callback = netdev->callbacks)) {
if (m) {
assert(callback->link);
assert(callback->callback);
assert(netdev->manager);
assert(netdev->manager->rtnl);
callback->callback(netdev->manager->rtnl, m, callback->link);
}
LIST_REMOVE(callbacks, netdev->callbacks, callback);
link_unref(callback->link);
free(callback);
}
}
static void netdev_free(NetDev *netdev) {
if (!netdev)
return;
netdev_cancel_callbacks(netdev);
if (netdev->ifname && netdev->manager)
hashmap_remove(netdev->manager->netdevs, netdev->ifname);
free(netdev->filename);
free(netdev->description);
free(netdev->ifname);
free(netdev->mac);
condition_free_list(netdev->match_host);
condition_free_list(netdev->match_virt);
condition_free_list(netdev->match_kernel_cmdline);
condition_free_list(netdev->match_kernel_version);
condition_free_list(netdev->match_arch);
/* Invoke the per-kind done() destructor, but only if the state field is initialized. We conditionalize that
* because we parse .netdev files twice: once to determine the kind (with a short, minimal NetDev structure
* allocation, with no room for per-kind fields), and once to read the kind's properties (with a full,
* comprehensive NetDev structure allocation with enough space for whatever the specific kind needs). Now, in
* the first case we shouldn't try to destruct the per-kind NetDev fields on destruction, in the second case we
* should. We use the state field to discern the two cases: it's _NETDEV_STATE_INVALID on the first "raw"
* call. */
if (netdev->state != _NETDEV_STATE_INVALID &&
NETDEV_VTABLE(netdev) &&
NETDEV_VTABLE(netdev)->done)
NETDEV_VTABLE(netdev)->done(netdev);
free(netdev);
}
NetDev *netdev_unref(NetDev *netdev) {
if (netdev && (-- netdev->n_ref <= 0))
netdev_free(netdev);
return NULL;
}
NetDev *netdev_ref(NetDev *netdev) {
if (netdev)
assert_se(++ netdev->n_ref >= 2);
return netdev;
}
void netdev_drop(NetDev *netdev) {
if (!netdev || netdev->state == NETDEV_STATE_LINGER)
return;
netdev->state = NETDEV_STATE_LINGER;
log_netdev_debug(netdev, "netdev removed");
netdev_cancel_callbacks(netdev);
netdev_unref(netdev);
return;
}
int netdev_get(Manager *manager, const char *name, NetDev **ret) {
NetDev *netdev;
assert(manager);
assert(name);
assert(ret);
netdev = hashmap_get(manager->netdevs, name);
if (!netdev) {
*ret = NULL;
return -ENOENT;
}
*ret = netdev;
return 0;
}
static int netdev_enter_failed(NetDev *netdev) {
netdev->state = NETDEV_STATE_FAILED;
netdev_cancel_callbacks(netdev);
return 0;
}
static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_handler_t callback) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
int r;
assert(netdev);
assert(netdev->state == NETDEV_STATE_READY);
assert(netdev->manager);
assert(netdev->manager->rtnl);
assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
assert(link);
assert(callback);
if (link->flags & IFF_UP) {
log_netdev_debug(netdev, "Link '%s' was up when attempting to enslave it. Bringing link down.", link->ifname);
r = link_down(link);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not bring link down: %m");
}
r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not allocate RTM_SETLINK message: %m");
r = sd_netlink_message_append_u32(req, IFLA_MASTER, netdev->ifindex);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
r = sd_netlink_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0)
return log_netdev_error(netdev, "Could not send rtnetlink message: %m");
link_ref(link);
log_netdev_debug(netdev, "Enslaving link '%s'", link->ifname);
return 0;
}
static int netdev_enter_ready(NetDev *netdev) {
netdev_join_callback *callback, *callback_next;
int r;
assert(netdev);
assert(netdev->ifname);
if (netdev->state != NETDEV_STATE_CREATING)
return 0;
netdev->state = NETDEV_STATE_READY;
log_netdev_info(netdev, "netdev ready");
LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
/* enslave the links that were attempted to be enslaved before the
* link was ready */
r = netdev_enslave_ready(netdev, callback->link, callback->callback);
if (r < 0)
return r;
LIST_REMOVE(callbacks, netdev->callbacks, callback);
link_unref(callback->link);
free(callback);
}
if (NETDEV_VTABLE(netdev)->post_create)
NETDEV_VTABLE(netdev)->post_create(netdev, NULL, NULL);
return 0;
}
/* callback for netdev's created without a backing Link */
static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
_cleanup_netdev_unref_ NetDev *netdev = userdata;
int r;
assert(netdev->state != _NETDEV_STATE_INVALID);
r = sd_netlink_message_get_errno(m);
if (r == -EEXIST)
log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
else if (r < 0) {
log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
netdev_drop(netdev);
return 1;
}
log_netdev_debug(netdev, "Created");
return 1;
}
int netdev_enslave(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
int r;
assert(netdev);
assert(netdev->manager);
assert(netdev->manager->rtnl);
assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND, NETDEV_KIND_VRF));
if (netdev->state == NETDEV_STATE_READY) {
r = netdev_enslave_ready(netdev, link, callback);
if (r < 0)
return r;
} else if (IN_SET(netdev->state, NETDEV_STATE_LINGER, NETDEV_STATE_FAILED)) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
r = rtnl_message_new_synthetic_error(netdev->manager->rtnl, -ENODEV, 0, &m);
if (r >= 0)
callback(netdev->manager->rtnl, m, link);
} else {
/* the netdev is not yet read, save this request for when it is */
netdev_join_callback *cb;
cb = new0(netdev_join_callback, 1);
if (!cb)
return log_oom();
cb->callback = callback;
cb->link = link;
link_ref(link);
LIST_PREPEND(callbacks, netdev->callbacks, cb);
log_netdev_debug(netdev, "Will enslave '%s', when ready", link->ifname);
}
return 0;
}
int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
uint16_t type;
const char *kind;
const char *received_kind;
const char *received_name;
int r, ifindex;
assert(netdev);
assert(message);
r = sd_netlink_message_get_type(message, &type);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
if (type != RTM_NEWLINK) {
log_netdev_error(netdev, "Cannot set ifindex from unexpected rtnl message type.");
return -EINVAL;
}
r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
if (r < 0) {
log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
netdev_enter_failed(netdev);
return r;
} else if (ifindex <= 0) {
log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
netdev_enter_failed(netdev);
return -EINVAL;
}
if (netdev->ifindex > 0) {
if (netdev->ifindex != ifindex) {
log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
ifindex, netdev->ifindex);
netdev_enter_failed(netdev);
return -EEXIST;
} else
/* ifindex already set to the same for this netdev */
return 0;
}
r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
if (!streq(netdev->ifname, received_name)) {
log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
netdev_enter_failed(netdev);
return r;
}
r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
r = sd_netlink_message_exit_container(message);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
if (netdev->kind == NETDEV_KIND_TAP)
/* the kernel does not distinguish between tun and tap */
kind = "tun";
else {
kind = netdev_kind_to_string(netdev->kind);
if (!kind) {
log_netdev_error(netdev, "Could not get kind");
netdev_enter_failed(netdev);
return -EINVAL;
}
}
if (!streq(kind, received_kind)) {
log_netdev_error(netdev,
"Received newlink with wrong KIND %s, "
"expected %s", received_kind, kind);
netdev_enter_failed(netdev);
return r;
}
netdev->ifindex = ifindex;
log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
netdev_enter_ready(netdev);
return 0;
}
#define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
_cleanup_free_ struct ether_addr *mac = NULL;
uint64_t result;
size_t l, sz;
uint8_t *v;
int r;
assert(ifname);
assert(ret);
mac = new0(struct ether_addr, 1);
if (!mac)
return -ENOMEM;
l = strlen(ifname);
sz = sizeof(sd_id128_t) + l;
v = alloca(sz);
/* fetch some persistent data unique to the machine */
r = sd_id128_get_machine((sd_id128_t*) v);
if (r < 0)
return r;
/* combine with some data unique (on this machine) to this
* netdev */
memcpy(v + sizeof(sd_id128_t), ifname, l);
/* Let's hash the host machine ID plus the container name. We
* use a fixed, but originally randomly created hash key here. */
result = siphash24(v, sz, HASH_KEY.bytes);
assert_cc(ETH_ALEN <= sizeof(result));
memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
/* see eth_random_addr in the kernel */
mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */
mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */
*ret = TAKE_PTR(mac);
return 0;
}
static int netdev_create(NetDev *netdev, Link *link,
sd_netlink_message_handler_t callback) {
int r;
assert(netdev);
assert(!link || callback);
/* create netdev */
if (NETDEV_VTABLE(netdev)->create) {
assert(!link);
r = NETDEV_VTABLE(netdev)->create(netdev);
if (r < 0)
return r;
log_netdev_debug(netdev, "Created");
} else {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
if (netdev->mac) {
r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
}
if (netdev->mtu) {
r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
}
if (link) {
r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINK attribute: %m");
}
r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
if (NETDEV_VTABLE(netdev)->fill_message_create) {
r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
if (r < 0)
return r;
}
r = sd_netlink_message_close_container(m);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
r = sd_netlink_message_close_container(m);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
if (link) {
r = sd_netlink_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
link_ref(link);
} else {
r = sd_netlink_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
netdev_ref(netdev);
}
netdev->state = NETDEV_STATE_CREATING;
log_netdev_debug(netdev, "Creating");
}
return 0;
}
/* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
int netdev_join(NetDev *netdev, Link *link, sd_netlink_message_handler_t callback) {
int r;
assert(netdev);
assert(netdev->manager);
assert(netdev->manager->rtnl);
assert(NETDEV_VTABLE(netdev));
switch (NETDEV_VTABLE(netdev)->create_type) {
case NETDEV_CREATE_MASTER:
r = netdev_enslave(netdev, link, callback);
if (r < 0)
return r;
break;
case NETDEV_CREATE_STACKED:
r = netdev_create(netdev, link, callback);
if (r < 0)
return r;
break;
default:
assert_not_reached("Can not join independent netdev");
}
return 0;
}
static int netdev_load_one(Manager *manager, const char *filename) {
_cleanup_netdev_unref_ NetDev *netdev_raw = NULL, *netdev = NULL;
_cleanup_fclose_ FILE *file = NULL;
const char *dropin_dirname;
bool independent = false;
int r;
assert(manager);
assert(filename);
file = fopen(filename, "re");
if (!file) {
if (errno == ENOENT)
return 0;
return -errno;
}
if (null_or_empty_fd(fileno(file))) {
log_debug("Skipping empty file: %s", filename);
return 0;
}
netdev_raw = new0(NetDev, 1);
if (!netdev_raw)
return log_oom();
netdev_raw->n_ref = 1;
netdev_raw->kind = _NETDEV_KIND_INVALID;
netdev_raw->state = _NETDEV_STATE_INVALID; /* an invalid state means done() of the implementation won't be called on destruction */
dropin_dirname = strjoina(basename(filename), ".d");
r = config_parse_many(filename, network_dirs, dropin_dirname,
"Match\0NetDev\0",
config_item_perf_lookup, network_netdev_gperf_lookup,
CONFIG_PARSE_WARN|CONFIG_PARSE_RELAXED, netdev_raw);
if (r < 0)
return r;
/* skip out early if configuration does not match the environment */
if (net_match_config(NULL, NULL, NULL, NULL, NULL,
netdev_raw->match_host, netdev_raw->match_virt,
netdev_raw->match_kernel_cmdline, netdev_raw->match_kernel_version,
netdev_raw->match_arch,
NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
return 0;
if (netdev_raw->kind == _NETDEV_KIND_INVALID) {
log_warning("NetDev has no Kind configured in %s. Ignoring", filename);
return 0;
}
if (!netdev_raw->ifname) {
log_warning("NetDev without Name configured in %s. Ignoring", filename);
return 0;
}
r = fseek(file, 0, SEEK_SET);
if (r < 0)
return -errno;
netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
if (!netdev)
return log_oom();
netdev->n_ref = 1;
netdev->manager = manager;
netdev->kind = netdev_raw->kind;
netdev->state = NETDEV_STATE_LOADING; /* we initialize the state here for the first time, so that done() will be called on destruction */
if (NETDEV_VTABLE(netdev)->init)
NETDEV_VTABLE(netdev)->init(netdev);
r = config_parse(NULL, filename, file,
NETDEV_VTABLE(netdev)->sections,
config_item_perf_lookup, network_netdev_gperf_lookup,
CONFIG_PARSE_WARN, netdev);
if (r < 0)
return r;
/* verify configuration */
if (NETDEV_VTABLE(netdev)->config_verify) {
r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
if (r < 0)
return 0;
}
netdev->filename = strdup(filename);
if (!netdev->filename)
return log_oom();
if (!netdev->mac && netdev->kind != NETDEV_KIND_VLAN) {
r = netdev_get_mac(netdev->ifname, &netdev->mac);
if (r < 0)
return log_error_errno(r, "Failed to generate predictable MAC address for %s: %m", netdev->ifname);
}
r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
if (r < 0)
return r;
LIST_HEAD_INIT(netdev->callbacks);
log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
switch (NETDEV_VTABLE(netdev)->create_type) {
case NETDEV_CREATE_MASTER:
case NETDEV_CREATE_INDEPENDENT:
r = netdev_create(netdev, NULL, NULL);
if (r < 0)
return r;
break;
default:
break;
}
switch (netdev->kind) {
case NETDEV_KIND_IPIP:
independent = IPIP(netdev)->independent;
break;
case NETDEV_KIND_GRE:
independent = GRE(netdev)->independent;
break;
case NETDEV_KIND_GRETAP:
independent = GRETAP(netdev)->independent;
break;
case NETDEV_KIND_IP6GRE:
independent = IP6GRE(netdev)->independent;
break;
case NETDEV_KIND_IP6GRETAP:
independent = IP6GRETAP(netdev)->independent;
break;
case NETDEV_KIND_SIT:
independent = SIT(netdev)->independent;
break;
case NETDEV_KIND_VTI:
independent = VTI(netdev)->independent;
break;
case NETDEV_KIND_VTI6:
independent = VTI6(netdev)->independent;
break;
case NETDEV_KIND_IP6TNL:
independent = IP6TNL(netdev)->independent;
break;
default:
break;
}
if (independent) {
r = netdev_create(netdev, NULL, NULL);
if (r < 0)
return r;
}
netdev = NULL;
return 0;
}
int netdev_load(Manager *manager) {
_cleanup_strv_free_ char **files = NULL;
NetDev *netdev;
char **f;
int r;
assert(manager);
while ((netdev = hashmap_first(manager->netdevs)))
netdev_unref(netdev);
r = conf_files_list_strv(&files, ".netdev", NULL, 0, network_dirs);
if (r < 0)
return log_error_errno(r, "Failed to enumerate netdev files: %m");
STRV_FOREACH_BACKWARDS(f, files) {
r = netdev_load_one(manager, *f);
if (r < 0)
return r;
}
return 0;
}
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