| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <net/if.h> |
| #include <netinet/in.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "bareudp.h" |
| #include "bond.h" |
| #include "bridge.h" |
| #include "conf-files.h" |
| #include "conf-parser.h" |
| #include "dummy.h" |
| #include "fd-util.h" |
| #include "fou-tunnel.h" |
| #include "geneve.h" |
| #include "ifb.h" |
| #include "ipvlan.h" |
| #include "l2tp-tunnel.h" |
| #include "list.h" |
| #include "macsec.h" |
| #include "macvlan.h" |
| #include "netdev.h" |
| #include "netdevsim.h" |
| #include "netlink-util.h" |
| #include "network-internal.h" |
| #include "networkd-manager.h" |
| #include "nlmon.h" |
| #include "path-lookup.h" |
| #include "siphash24.h" |
| #include "stat-util.h" |
| #include "string-table.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "tunnel.h" |
| #include "tuntap.h" |
| #include "vcan.h" |
| #include "veth.h" |
| #include "vlan.h" |
| #include "vrf.h" |
| #include "vxcan.h" |
| #include "vxlan.h" |
| #include "wireguard.h" |
| #include "xfrm.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_IPVTAP] = &ipvtap_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, |
| [NETDEV_KIND_L2TP] = &l2tptnl_vtable, |
| [NETDEV_KIND_MACSEC] = &macsec_vtable, |
| [NETDEV_KIND_NLMON] = &nlmon_vtable, |
| [NETDEV_KIND_XFRM] = &xfrm_vtable, |
| [NETDEV_KIND_IFB] = &ifb_vtable, |
| [NETDEV_KIND_BAREUDP] = &bare_udp_vtable, |
| }; |
| |
| static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
| [NETDEV_KIND_BAREUDP] = "bareudp", |
| [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_IPVTAP] = "ipvtap", |
| [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", |
| [NETDEV_KIND_L2TP] = "l2tp", |
| [NETDEV_KIND_MACSEC] = "macsec", |
| [NETDEV_KIND_NLMON] = "nlmon", |
| [NETDEV_KIND_XFRM] = "xfrm", |
| [NETDEV_KIND_IFB] = "ifb", |
| }; |
| |
| 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_WARNING, 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_WARNING, 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->conditions); |
| |
| /* 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, NULL); |
| 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 ready, 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; |
| } |
| |
| static int netdev_create_after_configured(NetDev *netdev, Link *link) { |
| assert(netdev); |
| assert(link); |
| assert(NETDEV_VTABLE(netdev)->create_after_configured); |
| |
| return NETDEV_VTABLE(netdev)->create_after_configured(netdev, link); |
| } |
| |
| /* 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); |
| |
| switch (netdev_get_create_type(netdev)) { |
| 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; |
| case NETDEV_CREATE_AFTER_CONFIGURED: |
| r = netdev_create_after_configured(netdev, link); |
| if (r < 0) |
| return r; |
| break; |
| default: |
| assert_not_reached("Cannot 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, |
| NETDEV_COMMON_SECTIONS NETDEV_OTHER_SECTIONS, |
| config_item_perf_lookup, network_netdev_gperf_lookup, |
| CONFIG_PARSE_WARN, |
| netdev_raw, |
| NULL); |
| if (r < 0) |
| return r; |
| |
| /* skip out early if configuration does not match the environment */ |
| if (!condition_test_list(netdev_raw->conditions, environ, NULL, NULL, NULL)) { |
| log_debug("%s: Conditions in the file do not match the system environment, skipping.", filename); |
| 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, NULL); |
| 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_VTABLE(netdev)->generate_mac) { |
| r = netdev_get_mac(netdev->ifname, &netdev->mac); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, 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 == -EEXIST) { |
| NetDev *n = hashmap_get(netdev->manager->netdevs, netdev->ifname); |
| |
| assert(n); |
| if (!streq(netdev->filename, n->filename)) |
| log_netdev_warning_errno(netdev, r, |
| "The setting Name=%s in %s conflicts with the one in %s, ignoring", |
| netdev->ifname, netdev->filename, n->filename); |
| |
| /* Clear ifname before netdev_free() is called. Otherwise, the NetDev object 'n' is |
| * removed from the hashmap 'manager->netdevs'. */ |
| netdev->ifname = mfree(netdev->ifname); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| |
| LIST_HEAD_INIT(netdev->callbacks); |
| |
| log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
| |
| if (IN_SET(netdev_get_create_type(netdev), NETDEV_CREATE_MASTER, NETDEV_CREATE_INDEPENDENT)) { |
| r = netdev_create(netdev, NULL, NULL); |
| if (r < 0) |
| return r; |
| } |
| |
| 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; |
| case NETDEV_KIND_ERSPAN: |
| independent = ERSPAN(netdev)->independent; |
| break; |
| case NETDEV_KIND_XFRM: |
| independent = XFRM(netdev)->independent; |
| break; |
| case NETDEV_KIND_VXLAN: |
| independent = VXLAN(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, bool reload) { |
| _cleanup_strv_free_ char **files = NULL; |
| char **f; |
| int r; |
| |
| assert(manager); |
| |
| if (!reload) |
| 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(f, files) { |
| r = netdev_load_one(manager, *f); |
| if (r < 0) |
| log_error_errno(r, "Failed to load %s, ignoring: %m", *f); |
| } |
| |
| return 0; |
| } |