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-rw-r--r--src/network/netdev/netdev.c816
1 files changed, 816 insertions, 0 deletions
diff --git a/src/network/netdev/netdev.c b/src/network/netdev/netdev.c
new file mode 100644
index 0000000..0263917
--- /dev/null
+++ b/src/network/netdev/netdev.c
@@ -0,0 +1,816 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#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 "strv.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"
+#include "netdev/netdevsim.h"
+#include "netdev/fou-tunnel.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,
+ [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable,
+ [NETDEV_KIND_FOU] = &foutnl_vtable,
+ [NETDEV_KIND_ERSPAN] = &erspan_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",
+ [NETDEV_KIND_NETDEVSIM] = "netdevsim",
+ [NETDEV_KIND_FOU] = "fou",
+ [NETDEV_KIND_ERSPAN] = "erspan",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
+
+int config_parse_netdev_kind(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ NetDevKind k, *kind = data;
+
+ assert(rvalue);
+ assert(data);
+
+ k = netdev_kind_from_string(rvalue);
+ if (k < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse netdev kind, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ if (*kind != _NETDEV_KIND_INVALID && *kind != k) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Specified netdev kind is different from the previous value '%s', ignoring assignment: %s",
+ netdev_kind_to_string(*kind), rvalue);
+ return 0;
+ }
+
+ *kind = k;
+
+ return 0;
+}
+
+static void netdev_callbacks_clear(NetDev *netdev) {
+ netdev_join_callback *callback;
+
+ if (!netdev)
+ return;
+
+ while ((callback = netdev->callbacks)) {
+ LIST_REMOVE(callbacks, netdev->callbacks, callback);
+ link_unref(callback->link);
+ free(callback);
+ }
+}
+
+bool netdev_is_managed(NetDev *netdev) {
+ if (!netdev || !netdev->manager || !netdev->ifname)
+ return false;
+
+ return hashmap_get(netdev->manager->netdevs, netdev->ifname) == netdev;
+}
+
+static void netdev_detach_from_manager(NetDev *netdev) {
+ if (netdev->ifname && netdev->manager)
+ hashmap_remove(netdev->manager->netdevs, netdev->ifname);
+}
+
+static NetDev *netdev_free(NetDev *netdev) {
+ assert(netdev);
+
+ netdev_callbacks_clear(netdev);
+
+ netdev_detach_from_manager(netdev);
+
+ 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);
+
+ return mfree(netdev);
+}
+
+DEFINE_TRIVIAL_REF_UNREF_FUNC(NetDev, netdev, netdev_free);
+
+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_callbacks_clear(netdev);
+
+ netdev_detach_from_manager(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_callbacks_clear(netdev);
+
+ return 0;
+}
+
+static int netdev_enslave_ready(NetDev *netdev, Link* link, link_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 && netdev->kind == NETDEV_KIND_BOND) {
+ 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 = netlink_call_async(netdev->manager->rtnl, NULL, req, callback,
+ link_netlink_destroy_callback, link);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "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, NetDev *netdev) {
+ int r;
+
+ assert(netdev);
+ 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;
+}
+
+static int netdev_enslave(NetDev *netdev, Link *link, link_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 = new(netdev_join_callback, 1);
+ if (!cb)
+ return log_oom();
+
+ *cb = (netdev_join_callback) {
+ .callback = callback,
+ .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 = newa(uint8_t, 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, link_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 = netlink_call_async(netdev->manager->rtnl, NULL, m, callback,
+ link_netlink_destroy_callback, link);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
+
+ link_ref(link);
+ } else {
+ r = netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler,
+ netdev_destroy_callback, netdev);
+ 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, link_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;
+}
+
+int netdev_load_one(Manager *manager, const char *filename) {
+ _cleanup_(netdev_unrefp) 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 = new(NetDev, 1);
+ if (!netdev_raw)
+ return log_oom();
+
+ *netdev_raw = (NetDev) {
+ .n_ref = 1,
+ .kind = _NETDEV_KIND_INVALID,
+ .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_many(filename, network_dirs, dropin_dirname,
+ 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_ensure_allocated(&netdev->manager->netdevs, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ 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;
+ char **f;
+ int r;
+
+ assert(manager);
+
+ hashmap_clear_with_destructor(manager->netdevs, netdev_unref);
+
+ 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;
+}