2021-02-02 00:48:41 +00:00
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/*
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* hyperv_network_driver.c: network driver functions for Microsoft Hyper-V hosts
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*
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* Copyright (C) 2020 Datto Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include "datatypes.h"
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#include "viralloc.h"
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#include "network_conf.h"
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#include "hyperv_network_driver.h"
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#include "hyperv_wmi.h"
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#define VIR_FROM_THIS VIR_FROM_HYPERV
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Utility functions
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*/
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static virNetworkPtr
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hypervMsvmVirtualSwitchToNetwork(virConnectPtr conn, Msvm_VirtualEthernetSwitch *virtualSwitch)
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{
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unsigned char uuid[VIR_UUID_BUFLEN];
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if (virUUIDParse(virtualSwitch->data->Name, uuid) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Could not parse UUID from string '%s'"),
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virtualSwitch->data->Name);
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return NULL;
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}
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return virGetNetwork(conn, virtualSwitch->data->ElementName, uuid);
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}
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2021-02-02 00:48:42 +00:00
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static virNetworkPtr
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hypervNetworkLookup(virConnectPtr conn, const char *property, const char *value)
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{
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hypervPrivate *priv = conn->privateData;
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g_auto(virBuffer) query = VIR_BUFFER_INITIALIZER;
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g_autoptr(Msvm_VirtualEthernetSwitch) virtualSwitch = NULL;
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virBufferAsprintf(&query, MSVM_VIRTUALETHERNETSWITCH_WQL_SELECT "WHERE %s", property);
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virBufferEscapeSQL(&query, " = '%s'", value);
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if (hypervGetWmiClass(Msvm_VirtualEthernetSwitch, &virtualSwitch) < 0)
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return NULL;
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if (!virtualSwitch) {
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virReportError(VIR_ERR_NO_NETWORK,
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_("No network found with property '%s' = '%s'"), property, value);
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return NULL;
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}
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return hypervMsvmVirtualSwitchToNetwork(conn, virtualSwitch);
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}
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2021-02-02 00:48:41 +00:00
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Exported API functions
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*/
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2021-02-02 00:48:43 +00:00
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static int
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hypervConnectNumOfDefinedNetworks(virConnectPtr conn G_GNUC_UNUSED)
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{
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/* Hyper-V networks are always active */
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return 0;
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}
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static int
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hypervConnectListDefinedNetworks(virConnectPtr conn G_GNUC_UNUSED,
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char **const names G_GNUC_UNUSED,
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int maxnames G_GNUC_UNUSED)
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{
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/* Hyper-V networks are always active */
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return 0;
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}
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2021-02-02 00:48:41 +00:00
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#define MATCH(FLAG) (flags & (FLAG))
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static int
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hypervConnectListAllNetworks(virConnectPtr conn,
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virNetworkPtr **nets,
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unsigned int flags)
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{
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int ret = -1;
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hypervPrivate *priv = conn->privateData;
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size_t count = 0;
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size_t i;
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g_auto(virBuffer) query = { g_string_new(MSVM_VIRTUALETHERNETSWITCH_WQL_SELECT
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"WHERE HealthState = 5"), 0 };
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g_autoptr(Msvm_VirtualEthernetSwitch) switches = NULL;
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Msvm_VirtualEthernetSwitch *entry = NULL;
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virCheckFlags(VIR_CONNECT_LIST_NETWORKS_FILTERS_ALL, -1);
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/*
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* Hyper-V networks are always active, persistent, and
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* autostarted, so return zero elements in case we are asked
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* for networks different than that.
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*/
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if (MATCH(VIR_CONNECT_LIST_NETWORKS_FILTERS_ACTIVE) &&
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!(MATCH(VIR_CONNECT_LIST_NETWORKS_ACTIVE)))
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return 0;
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if (MATCH(VIR_CONNECT_LIST_NETWORKS_FILTERS_PERSISTENT) &&
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!(MATCH(VIR_CONNECT_LIST_NETWORKS_PERSISTENT)))
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return 0;
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if (MATCH(VIR_CONNECT_LIST_NETWORKS_FILTERS_AUTOSTART) &&
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!(MATCH(VIR_CONNECT_LIST_NETWORKS_AUTOSTART)))
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return 0;
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if (hypervGetWmiClass(Msvm_VirtualEthernetSwitch, &switches) < 0)
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goto cleanup;
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for (entry = switches; entry; entry = entry->next) {
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if (nets) {
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virNetworkPtr net = hypervMsvmVirtualSwitchToNetwork(conn, entry);
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if (!net)
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goto cleanup;
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if (VIR_APPEND_ELEMENT(*nets, count, net) < 0)
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goto cleanup;
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} else {
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++count;
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}
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}
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ret = count;
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cleanup:
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if (ret < 0 && nets && *nets) {
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for (i = 0; i < count; ++i)
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VIR_FREE((*nets)[i]);
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VIR_FREE(*nets);
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}
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return ret;
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}
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#undef MATCH
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static int
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hypervConnectNumOfNetworks(virConnectPtr conn)
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{
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return hypervConnectListAllNetworks(conn, NULL, 0);
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}
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2021-02-02 00:48:42 +00:00
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static virNetworkPtr
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hypervNetworkLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
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{
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char uuid_string[VIR_UUID_STRING_BUFLEN];
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virUUIDFormat(uuid, uuid_string);
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return hypervNetworkLookup(conn, "Name", uuid_string);
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}
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static virNetworkPtr
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hypervNetworkLookupByName(virConnectPtr conn, const char *name)
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{
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return hypervNetworkLookup(conn, "ElementName", name);
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}
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2021-02-02 00:48:41 +00:00
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virNetworkDriver hypervNetworkDriver = {
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.connectNumOfNetworks = hypervConnectNumOfNetworks, /* 7.1.0 */
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2021-02-02 00:48:43 +00:00
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.connectNumOfDefinedNetworks = hypervConnectNumOfDefinedNetworks, /* 7.1.0 */
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.connectListDefinedNetworks = hypervConnectListDefinedNetworks, /* 7.1.0 */
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2021-02-02 00:48:41 +00:00
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.connectListAllNetworks = hypervConnectListAllNetworks, /* 7.1.0 */
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2021-02-02 00:48:42 +00:00
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.networkLookupByUUID = hypervNetworkLookupByUUID, /* 7.1.0 */
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.networkLookupByName = hypervNetworkLookupByName, /* 7.1.0 */
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2021-02-02 00:48:41 +00:00
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};
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