diff options
Diffstat (limited to 'src/network/networkd-netdev.c')
| -rw-r--r-- | src/network/networkd-netdev.c | 716 |
1 files changed, 0 insertions, 716 deletions
diff --git a/src/network/networkd-netdev.c b/src/network/networkd-netdev.c deleted file mode 100644 index e7edc366af..0000000000 --- a/src/network/networkd-netdev.c +++ /dev/null @@ -1,716 +0,0 @@ -/*** - 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 "networkd-netdev.h" -#include "networkd.h" -#include "siphash24.h" -#include "stat-util.h" -#include "string-table.h" -#include "string-util.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, - -}; - -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", - -}; - -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) - return; - - rtnl_message_new_synthetic_error(-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) - 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); - condition_free_list(netdev->match_arch); - - if (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); - - 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(-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 = mac; - mac = NULL; - - 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_LINKINFO 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 = NULL; - _cleanup_free_ NetDev *netdev_raw = NULL; - _cleanup_fclose_ FILE *file = NULL; - int r; - - assert(manager); - assert(filename); - - file = fopen(filename, "re"); - if (!file) { - if (errno == ENOENT) - return 0; - else - 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->kind = _NETDEV_KIND_INVALID; - - r = config_parse(NULL, filename, file, - "Match\0NetDev\0", - config_item_perf_lookup, network_netdev_gperf_lookup, - true, false, true, netdev_raw); - if (r < 0) - return r; - - r = fseek(file, 0, SEEK_SET); - if (r < 0) - return -errno; - - /* 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, netdev_raw->match_arch, - NULL, NULL, NULL, NULL, NULL, NULL) <= 0) - return 0; - - if (netdev_raw->kind == _NETDEV_KIND_INVALID) { - log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename); - return 0; - } - - if (!netdev_raw->ifname) { - log_warning("NetDev without Name configured in %s. Ignoring", filename); - return 0; - } - - netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); - if (!netdev) - return log_oom(); - - netdev->n_ref = 1; - netdev->manager = manager; - netdev->state = _NETDEV_STATE_INVALID; - netdev->kind = netdev_raw->kind; - netdev->ifname = netdev_raw->ifname; - - 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, - false, false, false, 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 0; - - break; - default: - break; - } - - 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, 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; -} |