diff options
Diffstat (limited to 'src/network/netdev/netdev.c')
| -rw-r--r-- | src/network/netdev/netdev.c | 957 |
1 files changed, 957 insertions, 0 deletions
diff --git a/src/network/netdev/netdev.c b/src/network/netdev/netdev.c new file mode 100644 index 0000000..57127a8 --- /dev/null +++ b/src/network/netdev/netdev.c @@ -0,0 +1,957 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <net/if.h> +#include <netinet/in.h> +#include <linux/if_arp.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "arphrd-util.h" +#include "bareudp.h" +#include "batadv.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 "ipoib.h" +#include "ipvlan.h" +#include "l2tp-tunnel.h" +#include "list.h" +#include "macsec.h" +#include "macvlan.h" +#include "netdev.h" +#include "netdevsim.h" +#include "netif-util.h" +#include "netlink-util.h" +#include "networkd-manager.h" +#include "networkd-queue.h" +#include "networkd-setlink.h" +#include "networkd-sriov.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 "wlan.h" +#include "xfrm.h" + +const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { + [NETDEV_KIND_BAREUDP] = &bare_udp_vtable, + [NETDEV_KIND_BATADV] = &batadv_vtable, + [NETDEV_KIND_BOND] = &bond_vtable, + [NETDEV_KIND_BRIDGE] = &bridge_vtable, + [NETDEV_KIND_DUMMY] = &dummy_vtable, + [NETDEV_KIND_ERSPAN] = &erspan_vtable, + [NETDEV_KIND_FOU] = &foutnl_vtable, + [NETDEV_KIND_GENEVE] = &geneve_vtable, + [NETDEV_KIND_GRE] = &gre_vtable, + [NETDEV_KIND_GRETAP] = &gretap_vtable, + [NETDEV_KIND_IFB] = &ifb_vtable, + [NETDEV_KIND_IP6GRE] = &ip6gre_vtable, + [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable, + [NETDEV_KIND_IP6TNL] = &ip6tnl_vtable, + [NETDEV_KIND_IPIP] = &ipip_vtable, + [NETDEV_KIND_IPOIB] = &ipoib_vtable, + [NETDEV_KIND_IPVLAN] = &ipvlan_vtable, + [NETDEV_KIND_IPVTAP] = &ipvtap_vtable, + [NETDEV_KIND_L2TP] = &l2tptnl_vtable, + [NETDEV_KIND_MACSEC] = &macsec_vtable, + [NETDEV_KIND_MACVLAN] = &macvlan_vtable, + [NETDEV_KIND_MACVTAP] = &macvtap_vtable, + [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable, + [NETDEV_KIND_NLMON] = &nlmon_vtable, + [NETDEV_KIND_SIT] = &sit_vtable, + [NETDEV_KIND_TAP] = &tap_vtable, + [NETDEV_KIND_TUN] = &tun_vtable, + [NETDEV_KIND_VCAN] = &vcan_vtable, + [NETDEV_KIND_VETH] = &veth_vtable, + [NETDEV_KIND_VLAN] = &vlan_vtable, + [NETDEV_KIND_VRF] = &vrf_vtable, + [NETDEV_KIND_VTI6] = &vti6_vtable, + [NETDEV_KIND_VTI] = &vti_vtable, + [NETDEV_KIND_VXCAN] = &vxcan_vtable, + [NETDEV_KIND_VXLAN] = &vxlan_vtable, + [NETDEV_KIND_WIREGUARD] = &wireguard_vtable, + [NETDEV_KIND_WLAN] = &wlan_vtable, + [NETDEV_KIND_XFRM] = &xfrm_vtable, +}; + +static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { + [NETDEV_KIND_BAREUDP] = "bareudp", + [NETDEV_KIND_BATADV] = "batadv", + [NETDEV_KIND_BOND] = "bond", + [NETDEV_KIND_BRIDGE] = "bridge", + [NETDEV_KIND_DUMMY] = "dummy", + [NETDEV_KIND_ERSPAN] = "erspan", + [NETDEV_KIND_FOU] = "fou", + [NETDEV_KIND_GENEVE] = "geneve", + [NETDEV_KIND_GRE] = "gre", + [NETDEV_KIND_GRETAP] = "gretap", + [NETDEV_KIND_IFB] = "ifb", + [NETDEV_KIND_IP6GRE] = "ip6gre", + [NETDEV_KIND_IP6GRETAP] = "ip6gretap", + [NETDEV_KIND_IP6TNL] = "ip6tnl", + [NETDEV_KIND_IPIP] = "ipip", + [NETDEV_KIND_IPOIB] = "ipoib", + [NETDEV_KIND_IPVLAN] = "ipvlan", + [NETDEV_KIND_IPVTAP] = "ipvtap", + [NETDEV_KIND_L2TP] = "l2tp", + [NETDEV_KIND_MACSEC] = "macsec", + [NETDEV_KIND_MACVLAN] = "macvlan", + [NETDEV_KIND_MACVTAP] = "macvtap", + [NETDEV_KIND_NETDEVSIM] = "netdevsim", + [NETDEV_KIND_NLMON] = "nlmon", + [NETDEV_KIND_SIT] = "sit", + [NETDEV_KIND_TAP] = "tap", + [NETDEV_KIND_TUN] = "tun", + [NETDEV_KIND_VCAN] = "vcan", + [NETDEV_KIND_VETH] = "veth", + [NETDEV_KIND_VLAN] = "vlan", + [NETDEV_KIND_VRF] = "vrf", + [NETDEV_KIND_VTI6] = "vti6", + [NETDEV_KIND_VTI] = "vti", + [NETDEV_KIND_VXCAN] = "vxcan", + [NETDEV_KIND_VXLAN] = "vxlan", + [NETDEV_KIND_WIREGUARD] = "wireguard", + [NETDEV_KIND_WLAN] = "wlan", + [NETDEV_KIND_XFRM] = "xfrm", +}; + +DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); + +bool netdev_is_managed(NetDev *netdev) { + if (!netdev || !netdev->manager || !netdev->ifname) + return false; + + return hashmap_get(netdev->manager->netdevs, netdev->ifname) == netdev; +} + +static bool netdev_is_stacked_and_independent(NetDev *netdev) { + assert(netdev); + + if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) + return false; + + switch (netdev->kind) { + case NETDEV_KIND_ERSPAN: + return ERSPAN(netdev)->independent; + case NETDEV_KIND_GRE: + return GRE(netdev)->independent; + case NETDEV_KIND_GRETAP: + return GRETAP(netdev)->independent; + case NETDEV_KIND_IP6GRE: + return IP6GRE(netdev)->independent; + case NETDEV_KIND_IP6GRETAP: + return IP6GRETAP(netdev)->independent; + case NETDEV_KIND_IP6TNL: + return IP6TNL(netdev)->independent; + case NETDEV_KIND_IPIP: + return IPIP(netdev)->independent; + case NETDEV_KIND_SIT: + return SIT(netdev)->independent; + case NETDEV_KIND_VTI: + return VTI(netdev)->independent; + case NETDEV_KIND_VTI6: + return VTI6(netdev)->independent; + case NETDEV_KIND_VXLAN: + return VXLAN(netdev)->independent; + case NETDEV_KIND_XFRM: + return XFRM(netdev)->independent; + default: + return false; + } +} + +static bool netdev_is_stacked(NetDev *netdev) { + assert(netdev); + + if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) + return false; + + if (netdev_is_stacked_and_independent(netdev)) + return false; + + return true; +} + +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_detach_from_manager(netdev); + + free(netdev->filename); + + free(netdev->description); + free(netdev->ifname); + 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) + return; + + if (netdev_is_stacked(netdev)) { + /* The netdev may be removed due to the underlying device removal, and the device may + * be re-added later. */ + netdev->state = NETDEV_STATE_LOADING; + netdev->ifindex = 0; + + log_netdev_debug(netdev, "netdev removed"); + return; + } + + if (NETDEV_VTABLE(netdev) && NETDEV_VTABLE(netdev)->drop) + NETDEV_VTABLE(netdev)->drop(netdev); + + netdev->state = NETDEV_STATE_LINGER; + + log_netdev_debug(netdev, "netdev removed"); + + 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) + return -ENOENT; + + *ret = netdev; + + return 0; +} + +void netdev_enter_failed(NetDev *netdev) { + netdev->state = NETDEV_STATE_FAILED; +} + +static int netdev_enter_ready(NetDev *netdev) { + assert(netdev); + assert(netdev->ifname); + + if (netdev->state != NETDEV_STATE_CREATING) + return 0; + + netdev->state = NETDEV_STATE_READY; + + log_netdev_info(netdev, "netdev ready"); + + if (NETDEV_VTABLE(netdev)->post_create) + NETDEV_VTABLE(netdev)->post_create(netdev, 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_enter_failed(netdev); + + return 1; + } + + log_netdev_debug(netdev, "Created"); + + return 1; +} + +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) + return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL), "Cannot set ifindex from unexpected rtnl message type."); + + 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 -EINVAL; + } + + if (!NETDEV_VTABLE(netdev)->skip_netdev_kind_check) { + + 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 -EINVAL; + } + } + + 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_generate_hw_addr( + NetDev *netdev, + Link *parent, + const char *name, + const struct hw_addr_data *hw_addr, + struct hw_addr_data *ret) { + + struct hw_addr_data a = HW_ADDR_NULL; + bool is_static = false; + int r; + + assert(netdev); + assert(name); + assert(hw_addr); + assert(ret); + + if (hw_addr_equal(hw_addr, &HW_ADDR_NONE)) { + *ret = HW_ADDR_NULL; + return 0; + } + + if (hw_addr->length == 0) { + uint64_t result; + + /* HardwareAddress= is not specified. */ + + if (!NETDEV_VTABLE(netdev)->generate_mac) + goto finalize; + + if (!IN_SET(NETDEV_VTABLE(netdev)->iftype, ARPHRD_ETHER, ARPHRD_INFINIBAND)) + goto finalize; + + r = net_get_unique_predictable_data_from_name(name, &HASH_KEY, &result); + if (r < 0) { + log_netdev_warning_errno(netdev, r, + "Failed to generate persistent MAC address, ignoring: %m"); + goto finalize; + } + + a.length = arphrd_to_hw_addr_len(NETDEV_VTABLE(netdev)->iftype); + + switch (NETDEV_VTABLE(netdev)->iftype) { + case ARPHRD_ETHER: + assert(a.length <= sizeof(result)); + memcpy(a.bytes, &result, a.length); + + if (ether_addr_is_null(&a.ether) || ether_addr_is_broadcast(&a.ether)) { + log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), + "Failed to generate persistent MAC address, ignoring: %m"); + a = HW_ADDR_NULL; + goto finalize; + } + + break; + case ARPHRD_INFINIBAND: + if (result == 0) { + log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL), + "Failed to generate persistent MAC address: %m"); + goto finalize; + } + + assert(a.length >= sizeof(result)); + memzero(a.bytes, a.length - sizeof(result)); + memcpy(a.bytes + a.length - sizeof(result), &result, sizeof(result)); + break; + default: + assert_not_reached(); + } + + } else { + a = *hw_addr; + is_static = true; + } + + r = net_verify_hardware_address(name, is_static, NETDEV_VTABLE(netdev)->iftype, + parent ? &parent->hw_addr : NULL, &a); + if (r < 0) + return r; + +finalize: + *ret = a; + return 0; +} + +static int netdev_create_message(NetDev *netdev, Link *link, sd_netlink_message *m) { + int r; + + r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname); + if (r < 0) + return r; + + struct hw_addr_data hw_addr; + r = netdev_generate_hw_addr(netdev, link, netdev->ifname, &netdev->hw_addr, &hw_addr); + if (r < 0) + return r; + + if (hw_addr.length > 0) { + log_netdev_debug(netdev, "Using MAC address: %s", HW_ADDR_TO_STR(&hw_addr)); + r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &hw_addr); + if (r < 0) + return r; + } + + if (netdev->mtu != 0) { + r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu); + if (r < 0) + return r; + } + + if (link) { + r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex); + if (r < 0) + return r; + } + + r = sd_netlink_message_open_container(m, IFLA_LINKINFO); + if (r < 0) + return r; + + if (NETDEV_VTABLE(netdev)->fill_message_create) { + r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind)); + if (r < 0) + return r; + + 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 r; + } else { + r = sd_netlink_message_append_string(m, IFLA_INFO_KIND, netdev_kind_to_string(netdev->kind)); + if (r < 0) + return r; + } + + r = sd_netlink_message_close_container(m); + if (r < 0) + return r; + + return 0; +} + +static int independent_netdev_create(NetDev *netdev) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + int r; + + assert(netdev); + + /* create netdev */ + if (NETDEV_VTABLE(netdev)->create) { + r = NETDEV_VTABLE(netdev)->create(netdev); + if (r < 0) + return r; + + log_netdev_debug(netdev, "Created"); + return 0; + } + + r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); + if (r < 0) + return r; + + r = netdev_create_message(netdev, NULL, m); + if (r < 0) + return r; + + r = netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler, + netdev_destroy_callback, netdev); + if (r < 0) + return r; + + netdev_ref(netdev); + + netdev->state = NETDEV_STATE_CREATING; + log_netdev_debug(netdev, "Creating"); + return 0; +} + +static int stacked_netdev_create(NetDev *netdev, Link *link, Request *req) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; + int r; + + assert(netdev); + assert(netdev->manager); + assert(link); + assert(req); + + r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); + if (r < 0) + return r; + + r = netdev_create_message(netdev, link, m); + if (r < 0) + return r; + + r = request_call_netlink_async(netdev->manager->rtnl, m, req); + if (r < 0) + return r; + + netdev->state = NETDEV_STATE_CREATING; + log_netdev_debug(netdev, "Creating"); + return 0; +} + +static bool link_is_ready_to_create_stacked_netdev_one(Link *link, bool allow_unmanaged) { + assert(link); + + if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) + return false; + + if (!link->network) + return allow_unmanaged; + + if (link->set_link_messages > 0) + return false; + + /* If stacked netdevs are created before the underlying interface being activated, then + * the activation policy for the netdevs are ignored. See issue #22593. */ + if (!link->activated) + return false; + + return true; +} + +static bool link_is_ready_to_create_stacked_netdev(Link *link) { + return check_ready_for_all_sr_iov_ports(link, /* allow_unmanaged = */ false, + link_is_ready_to_create_stacked_netdev_one); +} + +static int netdev_is_ready_to_create(NetDev *netdev, Link *link) { + assert(netdev); + + if (netdev->state != NETDEV_STATE_LOADING) + return false; + + if (link && !link_is_ready_to_create_stacked_netdev(link)) + return false; + + if (NETDEV_VTABLE(netdev)->is_ready_to_create) + return NETDEV_VTABLE(netdev)->is_ready_to_create(netdev, link); + + return true; +} + +static int stacked_netdev_process_request(Request *req, Link *link, void *userdata) { + NetDev *netdev = ASSERT_PTR(userdata); + int r; + + assert(req); + assert(link); + + r = netdev_is_ready_to_create(netdev, link); + if (r <= 0) + return r; + + r = stacked_netdev_create(netdev, link, req); + if (r < 0) + return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); + + return 1; +} + +static int create_stacked_netdev_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) { + int r; + + assert(m); + assert(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0 && r != -EEXIST) { + log_link_message_warning_errno(link, m, r, "Could not create stacked netdev"); + link_enter_failed(link); + return 0; + } + + if (link->create_stacked_netdev_messages == 0) { + link->stacked_netdevs_created = true; + log_link_debug(link, "Stacked netdevs created."); + link_check_ready(link); + } + + return 0; +} + +int link_request_stacked_netdev(Link *link, NetDev *netdev) { + int r; + + assert(link); + assert(netdev); + + if (!netdev_is_stacked(netdev)) + return -EINVAL; + + if (!IN_SET(netdev->state, NETDEV_STATE_LOADING, NETDEV_STATE_FAILED) || netdev->ifindex > 0) + return 0; /* Already created. */ + + link->stacked_netdevs_created = false; + r = link_queue_request_full(link, REQUEST_TYPE_NETDEV_STACKED, + netdev, (mfree_func_t) netdev_unref, + trivial_hash_func, trivial_compare_func, + stacked_netdev_process_request, + &link->create_stacked_netdev_messages, + create_stacked_netdev_handler, NULL); + if (r < 0) + return log_link_error_errno(link, r, "Failed to request stacked netdev '%s': %m", + netdev->ifname); + if (r == 0) + return 0; + + netdev_ref(netdev); + log_link_debug(link, "Requested stacked netdev '%s'", netdev->ifname); + return 1; +} + +static int independent_netdev_process_request(Request *req, Link *link, void *userdata) { + NetDev *netdev = ASSERT_PTR(userdata); + int r; + + assert(!link); + + r = netdev_is_ready_to_create(netdev, NULL); + if (r <= 0) + return r; + + r = independent_netdev_create(netdev); + if (r < 0) + return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); + + return 1; +} + +static int netdev_request_to_create(NetDev *netdev) { + int r; + + assert(netdev); + assert(netdev->manager); + + if (netdev->manager->test_mode) + return 0; + + if (netdev_is_stacked(netdev)) + return 0; + + r = netdev_is_ready_to_create(netdev, NULL); + if (r < 0) + return r; + if (r > 0) { + /* If the netdev has no dependency, then create it now. */ + r = independent_netdev_create(netdev); + if (r < 0) + return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m"); + + } else { + /* Otherwise, wait for the dependencies being resolved. */ + r = netdev_queue_request(netdev, independent_netdev_process_request, NULL); + if (r < 0) + return log_netdev_warning_errno(netdev, r, "Failed to request to create netdev: %m"); + } + + return 0; +} + +int netdev_load_one(Manager *manager, const char *filename) { + _cleanup_(netdev_unrefp) NetDev *netdev_raw = NULL, *netdev = NULL; + const char *dropin_dirname; + int r; + + assert(manager); + assert(filename); + + r = null_or_empty_path(filename); + if (r < 0) + return log_warning_errno(r, "Failed to check if \"%s\" is empty: %m", filename); + if (r > 0) { + 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( + STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname, /* root = */ NULL, + NETDEV_COMMON_SECTIONS NETDEV_OTHER_SECTIONS, + config_item_perf_lookup, network_netdev_gperf_lookup, + CONFIG_PARSE_WARN, + netdev_raw, + NULL, + NULL); + if (r < 0) + return r; /* config_parse_many() logs internally. */ + + /* 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) + return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev has no Kind= configured in \"%s\", ignoring.", filename); + + if (!netdev_raw->ifname) + return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev without Name= configured in \"%s\", ignoring.", filename); + + 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( + STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname, /* root = */ NULL, + NETDEV_VTABLE(netdev)->sections, + config_item_perf_lookup, network_netdev_gperf_lookup, + CONFIG_PARSE_WARN, + netdev, NULL, NULL); + if (r < 0) + return r; /* config_parse_many() logs internally. */ + + /* verify configuration */ + if (NETDEV_VTABLE(netdev)->config_verify) { + r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); + if (r < 0) + return r; /* config_verify() logs internally. */ + } + + netdev->filename = strdup(filename); + if (!netdev->filename) + return log_oom(); + + r = hashmap_ensure_put(&netdev->manager->netdevs, &string_hash_ops, netdev->ifname, netdev); + if (r == -ENOMEM) + return log_oom(); + 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, + "Device was already configured by \"%s\", ignoring %s.", + n->filename, netdev->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 -EEXIST; + } + assert(r > 0); + + log_netdev_debug(netdev, "loaded \"%s\"", netdev_kind_to_string(netdev->kind)); + + r = netdev_request_to_create(netdev); + if (r < 0) + return r; /* netdev_request_to_create() logs internally. */ + + TAKE_PTR(netdev); + return 0; +} + +int netdev_load(Manager *manager, bool reload) { + _cleanup_strv_free_ char **files = NULL; + 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) + (void) netdev_load_one(manager, *f); + + return 0; +} + +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 = ASSERT_PTR(data); + + assert(filename); + assert(rvalue); + + k = netdev_kind_from_string(rvalue); + if (k < 0) { + log_syntax(unit, LOG_WARNING, filename, line, k, "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; +} + +int config_parse_netdev_hw_addr( + 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) { + + struct hw_addr_data *hw_addr = ASSERT_PTR(data); + + assert(rvalue); + + if (streq(rvalue, "none")) { + *hw_addr = HW_ADDR_NONE; + return 0; + } + + return config_parse_hw_addr(unit, filename, line, section, section_line, lvalue, ltype, rvalue, data, userdata); +} |