libvirt/src/conf/node_device_conf.c

/*
 * node_device_conf.c: config handling for node devices
 *
 * Copyright (C) 2009-2015 Red Hat, Inc.
 * Copyright (C) 2008 Virtual Iron Software, Inc.
 * Copyright (C) 2008 David F. Lively
 *
 * This library 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.
 *
 * This library 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 this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

#include <config.h>

#include <unistd.h>

#include "virerror.h"
#include "datatypes.h"
#include "viralloc.h"
#include "virstring.h"
#include "node_device_conf.h"
#include "device_conf.h"
#include "virxml.h"
#include "virbuffer.h"
#include "viruuid.h"
#include "virrandom.h"
#include "virlog.h"
#include "virfcp.h"

#define VIR_FROM_THIS VIR_FROM_NODEDEV

VIR_LOG_INIT("conf.node_device_conf");

VIR_ENUM_IMPL(virNodeDevDevnode,
              VIR_NODE_DEV_DEVNODE_LAST,
              "dev",
              "link",
);

VIR_ENUM_IMPL(virNodeDevCap,
              VIR_NODE_DEV_CAP_LAST,
              "system",
              "pci",
              "usb_device",
              "usb",
              "net",
              "scsi_host",
              "scsi_target",
              "scsi",
              "storage",
              "fc_host",
              "vports",
              "scsi_generic",
              "drm",
              "mdev_types",
              "mdev",
              "ccw",
);

VIR_ENUM_IMPL(virNodeDevNetCap,
              VIR_NODE_DEV_CAP_NET_LAST,
              "80203",
              "80211",
);

VIR_ENUM_IMPL(virNodeDevDRM,
              VIR_NODE_DEV_DRM_LAST,
              "primary",
              "control",
              "render",
);

static int
virNodeDevCapsDefParseString(const char *xpath,
                             xmlXPathContextPtr ctxt,
                             char **string)
{
    char *s;

    if (!(s = virXPathString(xpath, ctxt)))
        return -1;

    *string = s;
    return 0;
}


void
virNodeDeviceDefFree(virNodeDeviceDefPtr def)
{
    virNodeDevCapsDefPtr caps;

    if (!def)
        return;

    VIR_FREE(def->name);
    VIR_FREE(def->parent);
    VIR_FREE(def->parent_wwnn);
    VIR_FREE(def->parent_wwpn);
    VIR_FREE(def->parent_fabric_wwn);
    VIR_FREE(def->driver);
    VIR_FREE(def->sysfs_path);
    VIR_FREE(def->parent_sysfs_path);
    VIR_FREE(def->devnode);
    virStringListFree(def->devlinks);

    caps = def->caps;
    while (caps) {
        virNodeDevCapsDefPtr next = caps->next;
        virNodeDevCapsDefFree(caps);
        caps = next;
    }

    VIR_FREE(def);
}


static void
virPCIELinkFormat(virBufferPtr buf,
                  virPCIELinkPtr lnk,
                  const char *attrib)
{
    if (!lnk)
        return;

    virBufferAsprintf(buf, "<link validity='%s'", attrib);
    if (lnk->port >= 0)
        virBufferAsprintf(buf, " port='%d'", lnk->port);
    if (lnk->speed)
        virBufferAsprintf(buf, " speed='%s'",
                          virPCIELinkSpeedTypeToString(lnk->speed));
    virBufferAsprintf(buf, " width='%d'", lnk->width);
    virBufferAddLit(buf, "/>\n");
}


static void
virPCIEDeviceInfoFormat(virBufferPtr buf,
                        virPCIEDeviceInfoPtr info)
{
    if (!info->link_cap && !info->link_sta) {
        virBufferAddLit(buf, "<pci-express/>\n");
        return;
    }

    virBufferAddLit(buf, "<pci-express>\n");
    virBufferAdjustIndent(buf, 2);

    virPCIELinkFormat(buf, info->link_cap, "cap");
    virPCIELinkFormat(buf, info->link_sta, "sta");

    virBufferAdjustIndent(buf, -2);
    virBufferAddLit(buf, "</pci-express>\n");
}


static void
virNodeDeviceCapSystemDefFormat(virBufferPtr buf,
                                const virNodeDevCapData *data)
{
    char uuidstr[VIR_UUID_STRING_BUFLEN];

    if (data->system.product_name)
        virBufferEscapeString(buf, "<product>%s</product>\n",
                              data->system.product_name);
    virBufferAddLit(buf, "<hardware>\n");
    virBufferAdjustIndent(buf, 2);
    if (data->system.hardware.vendor_name)
        virBufferEscapeString(buf, "<vendor>%s</vendor>\n",
                              data->system.hardware.vendor_name);
    if (data->system.hardware.version)
        virBufferEscapeString(buf, "<version>%s</version>\n",
                              data->system.hardware.version);
    if (data->system.hardware.serial)
        virBufferEscapeString(buf, "<serial>%s</serial>\n",
                              data->system.hardware.serial);
    virUUIDFormat(data->system.hardware.uuid, uuidstr);
    virBufferAsprintf(buf, "<uuid>%s</uuid>\n", uuidstr);
    virBufferAdjustIndent(buf, -2);
    virBufferAddLit(buf, "</hardware>\n");

    virBufferAddLit(buf, "<firmware>\n");
    virBufferAdjustIndent(buf, 2);
    if (data->system.firmware.vendor_name)
        virBufferEscapeString(buf, "<vendor>%s</vendor>\n",
                              data->system.firmware.vendor_name);
    if (data->system.firmware.version)
        virBufferEscapeString(buf, "<version>%s</version>\n",
                              data->system.firmware.version);
    if (data->system.firmware.release_date)
        virBufferEscapeString(buf, "<release_date>%s</release_date>\n",
                              data->system.firmware.release_date);
    virBufferAdjustIndent(buf, -2);
    virBufferAddLit(buf, "</firmware>\n");
}


static void
virNodeDeviceCapPCIDefFormat(virBufferPtr buf,
                             const virNodeDevCapData *data)
{
    size_t i;

    if (data->pci_dev.klass >= 0)
        virBufferAsprintf(buf, "<class>0x%.6x</class>\n", data->pci_dev.klass);
    virBufferAsprintf(buf, "<domain>%d</domain>\n",
                      data->pci_dev.domain);
    virBufferAsprintf(buf, "<bus>%d</bus>\n", data->pci_dev.bus);
    virBufferAsprintf(buf, "<slot>%d</slot>\n",
                      data->pci_dev.slot);
    virBufferAsprintf(buf, "<function>%d</function>\n",
                      data->pci_dev.function);
    virBufferAsprintf(buf, "<product id='0x%04x'",
                      data->pci_dev.product);
    if (data->pci_dev.product_name)
        virBufferEscapeString(buf, ">%s</product>\n",
                              data->pci_dev.product_name);
    else
        virBufferAddLit(buf, "/>\n");
    virBufferAsprintf(buf, "<vendor id='0x%04x'",
                      data->pci_dev.vendor);
    if (data->pci_dev.vendor_name)
        virBufferEscapeString(buf, ">%s</vendor>\n",
                              data->pci_dev.vendor_name);
    else
        virBufferAddLit(buf, "/>\n");
    if (data->pci_dev.flags & VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION) {
        virBufferAddLit(buf, "<capability type='phys_function'>\n");
        virBufferAdjustIndent(buf, 2);
        virBufferAsprintf(buf,
                          "<address domain='0x%04x' bus='0x%02x' "
                          "slot='0x%02x' function='0x%d'/>\n",
                          data->pci_dev.physical_function->domain,
                          data->pci_dev.physical_function->bus,
                          data->pci_dev.physical_function->slot,
                          data->pci_dev.physical_function->function);
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</capability>\n");
    }
    if (data->pci_dev.flags & VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION) {
        virBufferAddLit(buf, "<capability type='virt_functions'");
        if (data->pci_dev.max_virtual_functions)
            virBufferAsprintf(buf, " maxCount='%u'",
                              data->pci_dev.max_virtual_functions);
        if (data->pci_dev.num_virtual_functions == 0) {
            virBufferAddLit(buf, "/>\n");
        } else {
            virBufferAddLit(buf, ">\n");
            virBufferAdjustIndent(buf, 2);
            for (i = 0; i < data->pci_dev.num_virtual_functions; i++) {
                virBufferAsprintf(buf,
                                  "<address domain='0x%04x' bus='0x%02x' "
                                  "slot='0x%02x' function='0x%d'/>\n",
                                  data->pci_dev.virtual_functions[i]->domain,
                                  data->pci_dev.virtual_functions[i]->bus,
                                  data->pci_dev.virtual_functions[i]->slot,
                                  data->pci_dev.virtual_functions[i]->function);
            }
            virBufferAdjustIndent(buf, -2);
            virBufferAddLit(buf, "</capability>\n");
        }
    }
    if (data->pci_dev.hdrType) {
        virBufferAsprintf(buf, "<capability type='%s'/>\n",
                          virPCIHeaderTypeToString(data->pci_dev.hdrType));
    }
    if (data->pci_dev.flags & VIR_NODE_DEV_CAP_FLAG_PCI_MDEV) {
        virBufferAddLit(buf, "<capability type='mdev_types'>\n");
        virBufferAdjustIndent(buf, 2);
        for (i = 0; i < data->pci_dev.nmdev_types; i++) {
            virMediatedDeviceTypePtr type = data->pci_dev.mdev_types[i];
            virBufferEscapeString(buf, "<type id='%s'>\n", type->id);
            virBufferAdjustIndent(buf, 2);
            if (type->name)
                virBufferEscapeString(buf, "<name>%s</name>\n",
                                      type->name);
            virBufferEscapeString(buf, "<deviceAPI>%s</deviceAPI>\n",
                                  type->device_api);
            virBufferAsprintf(buf,
                              "<availableInstances>%u</availableInstances>\n",
                              type->available_instances);
            virBufferAdjustIndent(buf, -2);
            virBufferAddLit(buf, "</type>\n");
        }
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</capability>\n");
    }
    if (data->pci_dev.nIommuGroupDevices) {
        virBufferAsprintf(buf, "<iommuGroup number='%d'>\n",
                          data->pci_dev.iommuGroupNumber);
        virBufferAdjustIndent(buf, 2);
        for (i = 0; i < data->pci_dev.nIommuGroupDevices; i++) {
            virBufferAsprintf(buf,
                              "<address domain='0x%04x' bus='0x%02x' "
                              "slot='0x%02x' function='0x%d'/>\n",
                              data->pci_dev.iommuGroupDevices[i]->domain,
                              data->pci_dev.iommuGroupDevices[i]->bus,
                              data->pci_dev.iommuGroupDevices[i]->slot,
                              data->pci_dev.iommuGroupDevices[i]->function);
        }
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</iommuGroup>\n");
    }
    if (data->pci_dev.numa_node >= 0)
        virBufferAsprintf(buf, "<numa node='%d'/>\n",
                          data->pci_dev.numa_node);

    if (data->pci_dev.flags & VIR_NODE_DEV_CAP_FLAG_PCIE)
        virPCIEDeviceInfoFormat(buf, data->pci_dev.pci_express);
}


static void
virNodeDeviceCapUSBDevDefFormat(virBufferPtr buf,
                                const virNodeDevCapData *data)
{
    virBufferAsprintf(buf, "<bus>%d</bus>\n", data->usb_dev.bus);
    virBufferAsprintf(buf, "<device>%d</device>\n",
                      data->usb_dev.device);
    virBufferAsprintf(buf, "<product id='0x%04x'",
                      data->usb_dev.product);
    if (data->usb_dev.product_name)
        virBufferEscapeString(buf, ">%s</product>\n",
                              data->usb_dev.product_name);
    else
        virBufferAddLit(buf, " />\n");
    virBufferAsprintf(buf, "<vendor id='0x%04x'",
                      data->usb_dev.vendor);
    if (data->usb_dev.vendor_name)
        virBufferEscapeString(buf, ">%s</vendor>\n",
                              data->usb_dev.vendor_name);
    else
        virBufferAddLit(buf, " />\n");
}


static void
virNodeDeviceCapUSBInterfaceDefFormat(virBufferPtr buf,
                                      const virNodeDevCapData *data)
{
    virBufferAsprintf(buf, "<number>%d</number>\n",
                      data->usb_if.number);
    virBufferAsprintf(buf, "<class>%d</class>\n",
                      data->usb_if.klass);
    virBufferAsprintf(buf, "<subclass>%d</subclass>\n",
                      data->usb_if.subclass);
    virBufferAsprintf(buf, "<protocol>%d</protocol>\n",
                      data->usb_if.protocol);
    if (data->usb_if.description)
        virBufferEscapeString(buf,
                              "<description>%s</description>\n",
                              data->usb_if.description);
}


static void
virNodeDeviceCapNetDefFormat(virBufferPtr buf,
                             const virNodeDevCapData *data)
{
    size_t i;

    virBufferEscapeString(buf, "<interface>%s</interface>\n",
                          data->net.ifname);
    if (data->net.address)
        virBufferEscapeString(buf, "<address>%s</address>\n",
                              data->net.address);
    virInterfaceLinkFormat(buf, &data->net.lnk);
    if (data->net.features) {
        for (i = 0; i < VIR_NET_DEV_FEAT_LAST; i++) {
            if (virBitmapIsBitSet(data->net.features, i)) {
                virBufferAsprintf(buf, "<feature name='%s'/>\n",
                                  virNetDevFeatureTypeToString(i));
            }
        }
    }
    if (data->net.subtype != VIR_NODE_DEV_CAP_NET_LAST) {
        const char *subtyp =
            virNodeDevNetCapTypeToString(data->net.subtype);
        virBufferEscapeString(buf, "<capability type='%s'/>\n",
                              subtyp);
    }
}


static void
virNodeDeviceCapSCSIHostDefFormat(virBufferPtr buf,
                                  const virNodeDevCapData *data)
{
    virBufferAsprintf(buf, "<host>%d</host>\n",
                      data->scsi_host.host);
    if (data->scsi_host.unique_id != -1)
        virBufferAsprintf(buf, "<unique_id>%d</unique_id>\n",
                          data->scsi_host.unique_id);
    if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
        virBufferAddLit(buf, "<capability type='fc_host'>\n");
        virBufferAdjustIndent(buf, 2);
        virBufferEscapeString(buf, "<wwnn>%s</wwnn>\n",
                              data->scsi_host.wwnn);
        virBufferEscapeString(buf, "<wwpn>%s</wwpn>\n",
                              data->scsi_host.wwpn);
        virBufferEscapeString(buf, "<fabric_wwn>%s</fabric_wwn>\n",
                              data->scsi_host.fabric_wwn);
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</capability>\n");
    }
    if (data->scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS) {
        virBufferAddLit(buf, "<capability type='vport_ops'>\n");
        virBufferAdjustIndent(buf, 2);
        virBufferAsprintf(buf, "<max_vports>%d</max_vports>\n",
                          data->scsi_host.max_vports);
        virBufferAsprintf(buf, "<vports>%d</vports>\n",
                          data->scsi_host.vports);
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</capability>\n");
    }
}


static void
virNodeDeviceCapSCSIDefFormat(virBufferPtr buf,
                              const virNodeDevCapData *data)
{
    virBufferAsprintf(buf, "<host>%d</host>\n", data->scsi.host);
    virBufferAsprintf(buf, "<bus>%d</bus>\n", data->scsi.bus);
    virBufferAsprintf(buf, "<target>%d</target>\n",
                      data->scsi.target);
    virBufferAsprintf(buf, "<lun>%d</lun>\n", data->scsi.lun);
    if (data->scsi.type)
        virBufferEscapeString(buf, "<type>%s</type>\n",
                              data->scsi.type);
}


static void
virNodeDeviceCapStorageDefFormat(virBufferPtr buf,
                                 const virNodeDevCapData *data)
{
    virBufferEscapeString(buf, "<block>%s</block>\n",
                          data->storage.block);
    if (data->storage.bus)
        virBufferEscapeString(buf, "<bus>%s</bus>\n",
                              data->storage.bus);
    if (data->storage.drive_type)
        virBufferEscapeString(buf, "<drive_type>%s</drive_type>\n",
                              data->storage.drive_type);
    if (data->storage.model)
        virBufferEscapeString(buf, "<model>%s</model>\n",
                              data->storage.model);
    if (data->storage.vendor)
        virBufferEscapeString(buf, "<vendor>%s</vendor>\n",
                              data->storage.vendor);
    if (data->storage.serial)
        virBufferEscapeString(buf, "<serial>%s</serial>\n",
                              data->storage.serial);
    if (data->storage.flags & VIR_NODE_DEV_CAP_STORAGE_REMOVABLE) {
        int avl = data->storage.flags &
            VIR_NODE_DEV_CAP_STORAGE_REMOVABLE_MEDIA_AVAILABLE;
        virBufferAddLit(buf, "<capability type='removable'>\n");
        virBufferAdjustIndent(buf, 2);
        virBufferAsprintf(buf, "<media_available>%d"
                          "</media_available>\n", avl ? 1 : 0);
        virBufferAsprintf(buf, "<media_size>%llu</media_size>\n",
                          data->storage.removable_media_size);
        if (data->storage.media_label)
            virBufferEscapeString(buf,
                                  "<media_label>%s</media_label>\n",
                                  data->storage.media_label);
        if (data->storage.logical_block_size > 0)
            virBufferAsprintf(buf, "<logical_block_size>%llu"
                              "</logical_block_size>\n",
                              data->storage.logical_block_size);
        if (data->storage.num_blocks > 0)
            virBufferAsprintf(buf,
                              "<num_blocks>%llu</num_blocks>\n",
                              data->storage.num_blocks);
        virBufferAdjustIndent(buf, -2);
        virBufferAddLit(buf, "</capability>\n");
    } else {
        virBufferAsprintf(buf, "<size>%llu</size>\n",
                          data->storage.size);
        if (data->storage.logical_block_size > 0)
            virBufferAsprintf(buf, "<logical_block_size>%llu"
                              "</logical_block_size>\n",
                              data->storage.logical_block_size);
        if (data->storage.num_blocks > 0)
            virBufferAsprintf(buf, "<num_blocks>%llu</num_blocks>\n",
                              data->storage.num_blocks);
    }
    if (data->storage.flags & VIR_NODE_DEV_CAP_STORAGE_HOTPLUGGABLE)
        virBufferAddLit(buf, "<capability type='hotpluggable'/>\n");
}


char *
virNodeDeviceDefFormat(const virNodeDeviceDef *def)
{
    virBuffer buf = VIR_BUFFER_INITIALIZER;
    virNodeDevCapsDefPtr caps;
    size_t i = 0;

    virBufferAddLit(&buf, "<device>\n");
    virBufferAdjustIndent(&buf, 2);
    virBufferEscapeString(&buf, "<name>%s</name>\n", def->name);
    virBufferEscapeString(&buf, "<path>%s</path>\n", def->sysfs_path);
    if (def->devnode)
        virBufferEscapeString(&buf, "<devnode type='dev'>%s</devnode>\n",
                              def->devnode);
    if (def->devlinks) {
        for (i = 0; def->devlinks[i]; i++)
            virBufferEscapeString(&buf, "<devnode type='link'>%s</devnode>\n",
                                  def->devlinks[i]);
    }
    if (def->parent)
        virBufferEscapeString(&buf, "<parent>%s</parent>\n", def->parent);
    if (def->driver) {
        virBufferAddLit(&buf, "<driver>\n");
        virBufferAdjustIndent(&buf, 2);
        virBufferEscapeString(&buf, "<name>%s</name>\n", def->driver);
        virBufferAdjustIndent(&buf, -2);
        virBufferAddLit(&buf, "</driver>\n");
    }

    for (caps = def->caps; caps; caps = caps->next) {
        virNodeDevCapDataPtr data = &caps->data;

        virBufferAsprintf(&buf, "<capability type='%s'>\n",
                          virNodeDevCapTypeToString(caps->data.type));
        virBufferAdjustIndent(&buf, 2);
        switch (caps->data.type) {
        case VIR_NODE_DEV_CAP_SYSTEM:
            virNodeDeviceCapSystemDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_PCI_DEV:
            virNodeDeviceCapPCIDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_USB_DEV:
            virNodeDeviceCapUSBDevDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_USB_INTERFACE:
            virNodeDeviceCapUSBInterfaceDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_NET:
            virNodeDeviceCapNetDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_SCSI_HOST:
            virNodeDeviceCapSCSIHostDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_SCSI_TARGET:
            virBufferEscapeString(&buf, "<target>%s</target>\n",
                                  data->scsi_target.name);
            if (data->scsi_target.flags & VIR_NODE_DEV_CAP_FLAG_FC_RPORT) {
                virBufferAddLit(&buf, "<capability type='fc_remote_port'>\n");
                virBufferAdjustIndent(&buf, 2);
                virBufferAsprintf(&buf, "<rport>%s</rport>\n",
                                  data->scsi_target.rport);
                virBufferAsprintf(&buf, "<wwpn>%s</wwpn>\n",
                                  data->scsi_target.wwpn);
                virBufferAdjustIndent(&buf, -2);
                virBufferAddLit(&buf, "</capability>\n");
            }
            break;
        case VIR_NODE_DEV_CAP_SCSI:
            virNodeDeviceCapSCSIDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_STORAGE:
            virNodeDeviceCapStorageDefFormat(&buf, data);
            break;
        case VIR_NODE_DEV_CAP_SCSI_GENERIC:
            virBufferEscapeString(&buf, "<char>%s</char>\n",
                                  data->sg.path);
            break;
        case VIR_NODE_DEV_CAP_DRM:
            virBufferEscapeString(&buf, "<type>%s</type>\n", virNodeDevDRMTypeToString(data->drm.type));
            break;
        case VIR_NODE_DEV_CAP_MDEV:
            virBufferEscapeString(&buf, "<type id='%s'/>\n", data->mdev.type);
            virBufferAsprintf(&buf, "<iommuGroup number='%u'/>\n",
                              data->mdev.iommuGroupNumber);
            break;
        case VIR_NODE_DEV_CAP_CCW_DEV:
            virBufferAsprintf(&buf, "<cssid>0x%x</cssid>\n",
                              data->ccw_dev.cssid);
            virBufferAsprintf(&buf, "<ssid>0x%x</ssid>\n",
                              data->ccw_dev.ssid);
            virBufferAsprintf(&buf, "<devno>0x%04x</devno>\n",
                              data->ccw_dev.devno);
            break;
        case VIR_NODE_DEV_CAP_MDEV_TYPES:
        case VIR_NODE_DEV_CAP_FC_HOST:
        case VIR_NODE_DEV_CAP_VPORTS:
        case VIR_NODE_DEV_CAP_LAST:
            break;
        }

        virBufferAdjustIndent(&buf, -2);
        virBufferAddLit(&buf, "</capability>\n");
    }

    virBufferAdjustIndent(&buf, -2);
    virBufferAddLit(&buf, "</device>\n");

    return virBufferContentAndReset(&buf);
}


/**
 * virNodeDevCapsDefParseIntOptional:
 * @xpath:  XPath to evaluate
 * @ctxt:   Context
 * @value:  Where to store parsed value
 * @def:    Node device which is parsed
 * @invalid_error_fmt:  error message to print on invalid format
 *
 * Returns: -1 on error (invalid int format under @xpath)
 *           0 if @xpath was not found (@value is untouched)
 *           1 on success
 */
static int
virNodeDevCapsDefParseIntOptional(const char *xpath,
                                  xmlXPathContextPtr ctxt,
                                  int *value,
                                  virNodeDeviceDefPtr def,
                                  const char *invalid_error_fmt)
{
    int ret;
    int val;

    ret = virXPathInt(xpath, ctxt, &val);
    if (ret < -1) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       invalid_error_fmt,
                       def->name);
        return -1;
    } else if (ret == -1) {
        return 0;
    }
    *value = val;
    return 1;
}


static int
virNodeDevCapsDefParseULong(const char *xpath,
                            xmlXPathContextPtr ctxt,
                            unsigned *value,
                            virNodeDeviceDefPtr def,
                            const char *missing_error_fmt,
                            const char *invalid_error_fmt)
{
    int ret;
    unsigned long val;

    ret = virXPathULong(xpath, ctxt, &val);
    if (ret < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       ret == -1 ? missing_error_fmt : invalid_error_fmt,
                       def->name);
        return -1;
    }

    *value = val;
    return 0;
}


static int
virNodeDevCapsDefParseULongLong(const char *xpath,
                                xmlXPathContextPtr ctxt,
                                unsigned long long *value,
                                virNodeDeviceDefPtr def,
                                const char *missing_error_fmt,
                                const char *invalid_error_fmt)
{
    int ret;
    unsigned long long val;

    ret = virXPathULongLong(xpath, ctxt, &val);
    if (ret < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       ret == -1 ? missing_error_fmt : invalid_error_fmt,
                       def->name);
        return -1;
    }

    *value = val;
    return 0;
}


static int
virNodeDevCapDRMParseXML(xmlXPathContextPtr ctxt,
                         virNodeDeviceDefPtr def,
                         xmlNodePtr node,
                         virNodeDevCapDRMPtr drm)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1, val;
    char *type = NULL;

    ctxt->node = node;

    type = virXPathString("string(./type[1])", ctxt);

    if ((val = virNodeDevDRMTypeFromString(type)) < 0) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("unknown drm type '%s' for '%s'"), type, def->name);
        goto out;
    }
    drm->type = val;

    ret = 0;

 out:
    VIR_FREE(type);
    return ret;
}


static int
virNodeDevCapCCWParseXML(xmlXPathContextPtr ctxt,
                         virNodeDeviceDefPtr def,
                         xmlNodePtr node,
                         virNodeDevCapCCWPtr ccw_dev)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;
    char *cssid = NULL, *ssid = NULL, *devno = NULL;

    ctxt->node = node;

   if (!(cssid = virXPathString("string(./cssid[1])", ctxt))) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("missing cssid value for '%s'"), def->name);
        goto out;
    }

    if (virStrToLong_uip(cssid, NULL, 0, &ccw_dev->cssid) < 0) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("invalid cssid value '%s' for '%s'"),
                       cssid, def->name);
        goto out;
    }

    if (!(ssid = virXPathString("string(./ssid[1])", ctxt))) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("missing ssid value for '%s'"), def->name);
        goto out;
    }

    if (virStrToLong_uip(ssid, NULL, 0, &ccw_dev->ssid) < 0) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("invalid ssid value '%s' for '%s'"),
                       cssid, def->name);
        goto out;
    }

    if (!(devno = virXPathString("string(./devno[1])", ctxt))) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("missing devno value for '%s'"), def->name);
        goto out;
    }

    if (virStrToLong_uip(devno, NULL, 16, &ccw_dev->devno) < 0) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("invalid devno value '%s' for '%s'"),
                       devno, def->name);
        goto out;
    }

    ret = 0;

 out:
    VIR_FREE(cssid);
    VIR_FREE(ssid);
    VIR_FREE(devno);
    return ret;
}


static int
virNodeDevCapStorageParseXML(xmlXPathContextPtr ctxt,
                             virNodeDeviceDefPtr def,
                             xmlNodePtr node,
                             virNodeDevCapStoragePtr storage)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr *nodes = NULL;
    size_t i;
    int n, ret = -1;
    unsigned long long val;

    ctxt->node = node;

    storage->block = virXPathString("string(./block[1])", ctxt);
    if (!storage->block) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("no block device path supplied for '%s'"),
                       def->name);
        goto out;
    }

    storage->bus        = virXPathString("string(./bus[1])", ctxt);
    storage->drive_type = virXPathString("string(./drive_type[1])", ctxt);
    storage->model      = virXPathString("string(./model[1])", ctxt);
    storage->vendor     = virXPathString("string(./vendor[1])", ctxt);
    storage->serial     = virXPathString("string(./serial[1])", ctxt);

    if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
        goto out;

    for (i = 0; i < n; i++) {
        char *type = virXMLPropString(nodes[i], "type");

        if (!type) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("missing storage capability type for '%s'"),
                           def->name);
            goto out;
        }

        if (STREQ(type, "hotpluggable")) {
            storage->flags |= VIR_NODE_DEV_CAP_STORAGE_HOTPLUGGABLE;
        } else if (STREQ(type, "removable")) {
            xmlNodePtr orignode2;

            storage->flags |= VIR_NODE_DEV_CAP_STORAGE_REMOVABLE;

            orignode2 = ctxt->node;
            ctxt->node = nodes[i];

            if (virXPathBoolean("count(./media_available[. = '1']) > 0", ctxt))
                storage->flags |= VIR_NODE_DEV_CAP_STORAGE_REMOVABLE_MEDIA_AVAILABLE;

            storage->media_label = virXPathString("string(./media_label[1])", ctxt);

            val = 0;
            if (virNodeDevCapsDefParseULongLong("number(./media_size[1])", ctxt, &val, def,
                                                _("no removable media size supplied for '%s'"),
                                                _("invalid removable media size supplied for '%s'")) < 0) {
                VIR_FREE(type);
                goto out;
            }
            storage->removable_media_size = val;

            ctxt->node = orignode2;
        } else {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("unknown storage capability type '%s' for '%s'"),
                           type, def->name);
            VIR_FREE(type);
            goto out;
        }

        VIR_FREE(type);
    }

    if (!(storage->flags & VIR_NODE_DEV_CAP_STORAGE_REMOVABLE)) {
        val = 0;
        if (virNodeDevCapsDefParseULongLong("number(./size[1])", ctxt, &val, def,
                                            _("no size supplied for '%s'"),
                                            _("invalid size supplied for '%s'")) < 0)
            goto out;
        storage->size = val;
    }

    ret = 0;
 out:
    VIR_FREE(nodes);
    return ret;
}


static int
virNodeDevCapSCSIParseXML(xmlXPathContextPtr ctxt,
                          virNodeDeviceDefPtr def,
                          xmlNodePtr node,
                          virNodeDevCapSCSIPtr scsi)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;

    ctxt->node = node;

    if (virNodeDevCapsDefParseULong("number(./host[1])", ctxt,
                                    &scsi->host, def,
                                    _("no SCSI host ID supplied for '%s'"),
                                    _("invalid SCSI host ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./bus[1])", ctxt,
                                    &scsi->bus, def,
                                    _("no SCSI bus ID supplied for '%s'"),
                                    _("invalid SCSI bus ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./target[1])", ctxt,
                                    &scsi->target, def,
                                    _("no SCSI target ID supplied for '%s'"),
                                    _("invalid SCSI target ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./lun[1])", ctxt,
                                    &scsi->lun, def,
                                    _("no SCSI LUN ID supplied for '%s'"),
                                    _("invalid SCSI LUN ID supplied for '%s'")) < 0)
        goto out;

    scsi->type = virXPathString("string(./type[1])", ctxt);

    ret = 0;
 out:
    return ret;
}


static int
virNodeDevCapSCSITargetParseXML(xmlXPathContextPtr ctxt,
                                virNodeDeviceDefPtr def,
                                xmlNodePtr node,
                                virNodeDevCapSCSITargetPtr scsi_target)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr *nodes = NULL;
    int ret = -1, n = 0;
    size_t i;
    char *type = NULL;

    ctxt->node = node;

    scsi_target->name = virXPathString("string(./target[1])", ctxt);
    if (!scsi_target->name) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("no target name supplied for '%s'"),
                       def->name);
        goto out;
    }

    if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
        goto out;

    for (i = 0; i < n; ++i) {
        type = virXMLPropString(nodes[i], "type");

        if (!type) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("missing type for SCSI target capability for '%s'"),
                           def->name);
            goto out;
        }

        if (STREQ(type, "fc_remote_port")) {
            scsi_target->flags |= VIR_NODE_DEV_CAP_FLAG_FC_RPORT;

            ctxt->node = nodes[i];

            if (virNodeDevCapsDefParseString("string(./rport[1])",
                                             ctxt,
                                             &scsi_target->rport) < 0) {
                virReportError(VIR_ERR_INTERNAL_ERROR,
                               _("missing rport name for '%s'"), def->name);
                goto out;
            }

            if (virNodeDevCapsDefParseString("string(./wwpn[1])",
                                             ctxt, &scsi_target->wwpn) < 0) {
                virReportError(VIR_ERR_INTERNAL_ERROR,
                               _("missing wwpn identifier for '%s'"),
                               def->name);
                goto out;
            }
        } else {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("unknown SCSI target capability type '%s' for '%s'"),
                           type, def->name);
            goto out;
        }

        VIR_FREE(type);
    }

    ret = 0;

 out:
    VIR_FREE(type);
    VIR_FREE(nodes);
    return ret;
}


static int
virNodeDevCapSCSIHostParseXML(xmlXPathContextPtr ctxt,
                              virNodeDeviceDefPtr def,
                              xmlNodePtr node,
                              virNodeDevCapSCSIHostPtr scsi_host,
                              int create,
                              const char *virt_type)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr *nodes = NULL;
    int ret = -1, n = 0;
    size_t i;
    char *type = NULL;

    ctxt->node = node;

    if (create == EXISTING_DEVICE) {
        if (virNodeDevCapsDefParseULong("number(./host[1])", ctxt,
                                        &scsi_host->host, def,
                                        _("no SCSI host ID supplied for '%s'"),
                                        _("invalid SCSI host ID supplied for '%s'")) < 0) {
            goto out;
        }
        /* Optional unique_id value */
        scsi_host->unique_id = -1;
        if (virNodeDevCapsDefParseIntOptional("number(./unique_id[1])", ctxt,
                                              &scsi_host->unique_id, def,
                                              _("invalid unique_id supplied for '%s'")) < 0) {
            goto out;
        }
    }

    if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
        goto out;

    for (i = 0; i < n; i++) {
        type = virXMLPropString(nodes[i], "type");

        if (!type) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("missing SCSI host capability type for '%s'"),
                           def->name);
            goto out;
        }

        if (STREQ(type, "vport_ops")) {

            scsi_host->flags |= VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS;

        } else if (STREQ(type, "fc_host")) {
            scsi_host->flags |= VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST;

            ctxt->node = nodes[i];

            if (virNodeDevCapsDefParseString("string(./wwnn[1])",
                                             ctxt,
                                             &scsi_host->wwnn) < 0) {
                if (virRandomGenerateWWN(&scsi_host->wwnn, virt_type) < 0) {
                    virReportError(VIR_ERR_INTERNAL_ERROR,
                                   _("no WWNN supplied for '%s', and "
                                     "auto-generation failed"),
                                   def->name);
                    goto out;
                }
            }

            if (virNodeDevCapsDefParseString("string(./wwpn[1])",
                                             ctxt,
                                             &scsi_host->wwpn) < 0) {
                if (virRandomGenerateWWN(&scsi_host->wwpn, virt_type) < 0) {
                    virReportError(VIR_ERR_INTERNAL_ERROR,
                                   _("no WWPN supplied for '%s', and "
                                     "auto-generation failed"),
                                   def->name);
                    goto out;
                }
            }

            if (virNodeDevCapsDefParseString("string(./fabric_wwn[1])",
                                             ctxt,
                                             &scsi_host->fabric_wwn) < 0)
                VIR_DEBUG("No fabric_wwn defined for '%s'", def->name);

        } else {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("unknown SCSI host capability type '%s' for '%s'"),
                           type, def->name);
            goto out;
        }

        VIR_FREE(type);
    }

    ret = 0;

 out:
    VIR_FREE(type);
    VIR_FREE(nodes);
    return ret;
}


static int
virNodeDevCapNetParseXML(xmlXPathContextPtr ctxt,
                         virNodeDeviceDefPtr def,
                         xmlNodePtr node,
                         virNodeDevCapNetPtr net)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr lnk;
    size_t i = -1;
    int ret = -1, n = -1;
    char *tmp = NULL;
    xmlNodePtr *nodes = NULL;

    ctxt->node = node;

    net->ifname = virXPathString("string(./interface[1])", ctxt);
    if (!net->ifname) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("no network interface supplied for '%s'"),
                       def->name);
        goto out;
    }

    net->address = virXPathString("string(./address[1])", ctxt);

    if ((n = virXPathNodeSet("./feature", ctxt, &nodes)) < 0)
        goto out;

    if (n > 0) {
        if (!(net->features = virBitmapNew(VIR_NET_DEV_FEAT_LAST)))
            goto out;
    }

    for (i = 0; i < n; i++) {
        int val;
        if (!(tmp = virXMLPropString(nodes[i], "name"))) {
            virReportError(VIR_ERR_XML_ERROR, "%s",
                           _("missing network device feature name"));
            goto out;
        }

        if ((val = virNetDevFeatureTypeFromString(tmp)) < 0) {
            virReportError(VIR_ERR_XML_ERROR,
                           _("unknown network device feature '%s'"),
                           tmp);
            goto out;
        }
        ignore_value(virBitmapSetBit(net->features, val));
        VIR_FREE(tmp);
    }

    net->subtype = VIR_NODE_DEV_CAP_NET_LAST;

    tmp = virXPathString("string(./capability/@type)", ctxt);
    if (tmp) {
        int val = virNodeDevNetCapTypeFromString(tmp);
        VIR_FREE(tmp);
        if (val < 0) {
            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                           _("invalid network type supplied for '%s'"),
                           def->name);
            goto out;
        }
        net->subtype = val;
    }

    lnk = virXPathNode("./link", ctxt);
    if (lnk && virInterfaceLinkParseXML(lnk, &net->lnk) < 0)
        goto out;

    ret = 0;
 out:
    VIR_FREE(nodes);
    VIR_FREE(tmp);
    return ret;
}


static int
virNodeDevCapUSBInterfaceParseXML(xmlXPathContextPtr ctxt,
                                  virNodeDeviceDefPtr def,
                                  xmlNodePtr node,
                                  virNodeDevCapUSBIfPtr usb_if)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;

    ctxt->node = node;

    if (virNodeDevCapsDefParseULong("number(./number[1])", ctxt,
                                    &usb_if->number, def,
                                    _("no USB interface number supplied for '%s'"),
                                    _("invalid USB interface number supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./class[1])", ctxt,
                                    &usb_if->klass, def,
                                    _("no USB interface class supplied for '%s'"),
                                    _("invalid USB interface class supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./subclass[1])", ctxt,
                                    &usb_if->subclass, def,
                                    _("no USB interface subclass supplied for '%s'"),
                                    _("invalid USB interface subclass supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./protocol[1])", ctxt,
                                    &usb_if->protocol, def,
                                    _("no USB interface protocol supplied for '%s'"),
                                    _("invalid USB interface protocol supplied for '%s'")) < 0)
        goto out;

    usb_if->description = virXPathString("string(./description[1])", ctxt);

    ret = 0;
 out:
    return ret;
}


static int
virNodeDevCapsDefParseHexId(const char *xpath,
                            xmlXPathContextPtr ctxt,
                            unsigned *value,
                            virNodeDeviceDefPtr def,
                            const char *missing_error_fmt,
                            const char *invalid_error_fmt)
{
    int ret;
    unsigned long val;

    ret = virXPathULongHex(xpath, ctxt, &val);
    if (ret < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       ret == -1 ? missing_error_fmt : invalid_error_fmt,
                       def->name);
        return -1;
    }

    *value = val;
    return 0;
}


static int
virNodeDevCapUSBDevParseXML(xmlXPathContextPtr ctxt,
                            virNodeDeviceDefPtr def,
                            xmlNodePtr node,
                            virNodeDevCapUSBDevPtr usb_dev)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;

    ctxt->node = node;

    if (virNodeDevCapsDefParseULong("number(./bus[1])", ctxt,
                                    &usb_dev->bus, def,
                                    _("no USB bus number supplied for '%s'"),
                                    _("invalid USB bus number supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./device[1])", ctxt,
                                    &usb_dev->device, def,
                                    _("no USB device number supplied for '%s'"),
                                    _("invalid USB device number supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseHexId("string(./vendor[1]/@id)", ctxt,
                                    &usb_dev->vendor, def,
                                    _("no USB vendor ID supplied for '%s'"),
                                    _("invalid USB vendor ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseHexId("string(./product[1]/@id)", ctxt,
                                    &usb_dev->product, def,
                                    _("no USB product ID supplied for '%s'"),
                                    _("invalid USB product ID supplied for '%s'")) < 0)
        goto out;

    usb_dev->vendor_name  = virXPathString("string(./vendor[1])", ctxt);
    usb_dev->product_name = virXPathString("string(./product[1])", ctxt);

    ret = 0;
 out:
    return ret;
}


static int
virNodeDevCapPCIDevIommuGroupParseXML(xmlXPathContextPtr ctxt,
                                      xmlNodePtr iommuGroupNode,
                                      virNodeDevCapPCIDevPtr pci_dev)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr *addrNodes = NULL;
    char *numberStr = NULL;
    int nAddrNodes, ret = -1;
    size_t i;
    virPCIDeviceAddressPtr pciAddr = NULL;

    ctxt->node = iommuGroupNode;

    numberStr = virXMLPropString(iommuGroupNode, "number");
    if (!numberStr) {
        virReportError(VIR_ERR_XML_ERROR,
                       "%s", _("missing iommuGroup number attribute"));
        goto cleanup;
    }
    if (virStrToLong_ui(numberStr, NULL, 10,
                        &pci_dev->iommuGroupNumber) < 0) {
        virReportError(VIR_ERR_XML_ERROR,
                       _("invalid iommuGroup number attribute '%s'"),
                       numberStr);
        goto cleanup;
    }

    if ((nAddrNodes = virXPathNodeSet("./address", ctxt, &addrNodes)) < 0)
        goto cleanup;

    for (i = 0; i < nAddrNodes; i++) {
        virPCIDeviceAddress addr = {0};
        if (virPCIDeviceAddressParseXML(addrNodes[i], &addr) < 0)
            goto cleanup;
        if (VIR_ALLOC(pciAddr) < 0)
            goto cleanup;
        pciAddr->domain = addr.domain;
        pciAddr->bus = addr.bus;
        pciAddr->slot = addr.slot;
        pciAddr->function = addr.function;
        if (VIR_APPEND_ELEMENT(pci_dev->iommuGroupDevices,
                               pci_dev->nIommuGroupDevices,
                               pciAddr) < 0)
            goto cleanup;
    }

    ret = 0;
 cleanup:
    VIR_FREE(numberStr);
    VIR_FREE(addrNodes);
    VIR_FREE(pciAddr);
    return ret;
}


static int
virPCIEDeviceInfoLinkParseXML(xmlXPathContextPtr ctxt,
                              xmlNodePtr linkNode,
                              virPCIELinkPtr lnk)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1, speed;
    char *speedStr = NULL, *portStr = NULL;

    ctxt->node = linkNode;

    if (virXPathUInt("number(./@width)", ctxt, &lnk->width) < 0) {
        virReportError(VIR_ERR_XML_DETAIL, "%s",
                       _("mandatory attribute 'width' is missing or malformed"));
        goto cleanup;
    }

    if ((speedStr = virXPathString("string(./@speed)", ctxt))) {
        if ((speed = virPCIELinkSpeedTypeFromString(speedStr)) < 0) {
            virReportError(VIR_ERR_XML_DETAIL,
                           _("malformed 'speed' attribute: %s"),
                           speedStr);
            goto cleanup;
        }
        lnk->speed = speed;
    }

    if ((portStr = virXPathString("string(./@port)", ctxt))) {
        if (virStrToLong_i(portStr, NULL, 10, &lnk->port) < 0) {
            virReportError(VIR_ERR_XML_DETAIL,
                           _("malformed 'port' attribute: %s"),
                           portStr);
            goto cleanup;
        }
    } else {
        lnk->port = -1;
    }

    ret = 0;
 cleanup:
    VIR_FREE(portStr);
    VIR_FREE(speedStr);
    return ret;
}


static int
virPCIEDeviceInfoParseXML(xmlXPathContextPtr ctxt,
                          xmlNodePtr pciExpressNode,
                          virPCIEDeviceInfoPtr pci_express)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr lnk;
    int ret = -1;

    ctxt->node = pciExpressNode;

    if ((lnk = virXPathNode("./link[@validity='cap']", ctxt))) {
        if (VIR_ALLOC(pci_express->link_cap) < 0)
            goto cleanup;

        if (virPCIEDeviceInfoLinkParseXML(ctxt, lnk,
                                          pci_express->link_cap) < 0)
            goto cleanup;
    }

    if ((lnk = virXPathNode("./link[@validity='sta']", ctxt))) {
        if (VIR_ALLOC(pci_express->link_sta) < 0)
            goto cleanup;

        if (virPCIEDeviceInfoLinkParseXML(ctxt, lnk,
                                          pci_express->link_sta) < 0)
            goto cleanup;
    }

    ret = 0;
 cleanup:
    return ret;
}


static int
virNodeDevPCICapSRIOVPhysicalParseXML(xmlXPathContextPtr ctxt,
                                      virNodeDevCapPCIDevPtr pci_dev)
{
    xmlNodePtr address = virXPathNode("./address[1]", ctxt);

    if (VIR_ALLOC(pci_dev->physical_function) < 0)
        return -1;

    if (!address) {
        virReportError(VIR_ERR_XML_ERROR, "%s",
                       _("Missing address in 'phys_function' capability"));
        return -1;
    }

    if (virPCIDeviceAddressParseXML(address,
                                    pci_dev->physical_function) < 0)
        return -1;

    pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;

    return 0;
}


static int
virNodeDevPCICapSRIOVVirtualParseXML(xmlXPathContextPtr ctxt,
                                     virNodeDevCapPCIDevPtr pci_dev)
{
    int ret = -1;
    xmlNodePtr *addresses = NULL;
    int naddresses = virXPathNodeSet("./address", ctxt, &addresses);
    char *maxFuncsStr = virXPathString("string(./@maxCount)", ctxt);
    size_t i;

    if (naddresses < 0)
        goto cleanup;

    if (maxFuncsStr &&
        virStrToLong_uip(maxFuncsStr, NULL, 10,
                         &pci_dev->max_virtual_functions) < 0) {
        virReportError(VIR_ERR_XML_ERROR, "%s",
                       _("Malformed 'maxCount' parameter"));
        goto cleanup;
    }

    if (VIR_ALLOC_N(pci_dev->virtual_functions, naddresses) < 0)
        goto cleanup;

    for (i = 0; i < naddresses; i++) {
        virPCIDeviceAddressPtr addr = NULL;

        if (VIR_ALLOC(addr) < 0)
            goto cleanup;

        if (virPCIDeviceAddressParseXML(addresses[i], addr) < 0) {
            VIR_FREE(addr);
            goto cleanup;
        }

        if (VIR_APPEND_ELEMENT(pci_dev->virtual_functions,
                               pci_dev->num_virtual_functions,
                               addr) < 0)
            goto cleanup;
    }

    pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;
    ret = 0;
 cleanup:
    VIR_FREE(addresses);
    VIR_FREE(maxFuncsStr);
    return ret;
}


static int
virNodeDevPCICapMdevTypesParseXML(xmlXPathContextPtr ctxt,
                                  virNodeDevCapPCIDevPtr pci_dev)
{
    int ret = -1;
    xmlNodePtr orignode = NULL;
    xmlNodePtr *nodes = NULL;
    int nmdev_types = -1;
    virMediatedDeviceTypePtr type = NULL;
    size_t i;

    if ((nmdev_types = virXPathNodeSet("./type", ctxt, &nodes)) < 0)
        goto cleanup;

    orignode = ctxt->node;
    for (i = 0; i < nmdev_types; i++) {
        ctxt->node = nodes[i];

        if (VIR_ALLOC(type) < 0)
            goto cleanup;

        if (!(type->id = virXPathString("string(./@id[1])", ctxt))) {
            virReportError(VIR_ERR_XML_ERROR, "%s",
                           _("missing 'id' attribute for mediated device's "
                             "<type> element"));
            goto cleanup;
        }

        if (!(type->device_api = virXPathString("string(./deviceAPI[1])", ctxt))) {
            virReportError(VIR_ERR_XML_ERROR,
                           _("missing device API for mediated device type '%s'"),
                           type->id);
            goto cleanup;
        }

        if (virXPathUInt("number(./availableInstances)", ctxt,
                         &type->available_instances) < 0) {
            virReportError(VIR_ERR_XML_ERROR,
                           _("missing number of available instances for "
                             "mediated device type '%s'"),
                           type->id);
            goto cleanup;
        }

        type->name = virXPathString("string(./name)", ctxt);

        if (VIR_APPEND_ELEMENT(pci_dev->mdev_types,
                               pci_dev->nmdev_types, type) < 0)
            goto cleanup;
    }

    pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;
    ret = 0;
 cleanup:
    VIR_FREE(nodes);
    virMediatedDeviceTypeFree(type);
    ctxt->node = orignode;
    return ret;
}


static int
virNodeDevPCICapabilityParseXML(xmlXPathContextPtr ctxt,
                                xmlNodePtr node,
                                virNodeDevCapPCIDevPtr pci_dev)
{
    char *type = virXMLPropString(node, "type");
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;

    ctxt->node = node;

    if (!type) {
        virReportError(VIR_ERR_XML_ERROR, "%s", _("Missing capability type"));
        goto cleanup;
    }

    if (STREQ(type, "phys_function") &&
        virNodeDevPCICapSRIOVPhysicalParseXML(ctxt, pci_dev) < 0) {
        goto cleanup;
    } else if (STREQ(type, "virt_functions") &&
               virNodeDevPCICapSRIOVVirtualParseXML(ctxt, pci_dev) < 0) {
        goto cleanup;
    } else if (STREQ(type, "mdev_types") &&
        virNodeDevPCICapMdevTypesParseXML(ctxt, pci_dev) < 0) {
        goto cleanup;
    } else {
        int hdrType = virPCIHeaderTypeFromString(type);

        if (hdrType > 0 && !pci_dev->hdrType)
            pci_dev->hdrType = hdrType;
    }

    ret = 0;
 cleanup:
    VIR_FREE(type);
    return ret;
}


static int
virNodeDevCapPCIDevParseXML(xmlXPathContextPtr ctxt,
                            virNodeDeviceDefPtr def,
                            xmlNodePtr node,
                            virNodeDevCapPCIDevPtr pci_dev)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    xmlNodePtr iommuGroupNode;
    xmlNodePtr pciExpress;
    xmlNodePtr *nodes = NULL;
    int n = 0;
    int ret = -1;
    virPCIEDeviceInfoPtr pci_express = NULL;
    char *tmp = NULL;
    size_t i = 0;

    ctxt->node = node;

    if ((tmp = virXPathString("string(./class[1])", ctxt))) {
        if (virStrToLong_i(tmp, NULL, 16, &pci_dev->klass) < 0 ||
            pci_dev->klass > 0xffffff) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("invalid PCI class supplied for '%s'"), def->name);
            goto out;
        }
        VIR_FREE(tmp);
    } else {
        pci_dev->klass = -1;
    }

    if (virNodeDevCapsDefParseULong("number(./domain[1])", ctxt,
                                    &pci_dev->domain, def,
                                    _("no PCI domain ID supplied for '%s'"),
                                    _("invalid PCI domain ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./bus[1])", ctxt,
                                    &pci_dev->bus, def,
                                    _("no PCI bus ID supplied for '%s'"),
                                    _("invalid PCI bus ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./slot[1])", ctxt,
                                    &pci_dev->slot, def,
                                    _("no PCI slot ID supplied for '%s'"),
                                    _("invalid PCI slot ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseULong("number(./function[1])", ctxt,
                                    &pci_dev->function, def,
                                    _("no PCI function ID supplied for '%s'"),
                                    _("invalid PCI function ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseHexId("string(./vendor[1]/@id)", ctxt,
                                    &pci_dev->vendor, def,
                                    _("no PCI vendor ID supplied for '%s'"),
                                    _("invalid PCI vendor ID supplied for '%s'")) < 0)
        goto out;

    if (virNodeDevCapsDefParseHexId("string(./product[1]/@id)", ctxt,
                                    &pci_dev->product, def,
                                    _("no PCI product ID supplied for '%s'"),
                                    _("invalid PCI product ID supplied for '%s'")) < 0)
        goto out;

    pci_dev->vendor_name  = virXPathString("string(./vendor[1])", ctxt);
    pci_dev->product_name = virXPathString("string(./product[1])", ctxt);

    if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
        goto out;

    for (i = 0; i < n; i++) {
        if (virNodeDevPCICapabilityParseXML(ctxt, nodes[i], pci_dev) < 0)
            goto out;
    }
    VIR_FREE(nodes);

    if ((iommuGroupNode = virXPathNode("./iommuGroup[1]", ctxt))) {
        if (virNodeDevCapPCIDevIommuGroupParseXML(ctxt, iommuGroupNode,
                                                  pci_dev) < 0) {
            goto out;
        }
    }

    /* The default value is -1 since zero is valid NUMA node number */
    pci_dev->numa_node = -1;
    if (virNodeDevCapsDefParseIntOptional("number(./numa[1]/@node)", ctxt,
                                          &pci_dev->numa_node, def,
                                          _("invalid NUMA node ID supplied for '%s'")) < 0)
        goto out;

    if ((pciExpress = virXPathNode("./pci-express[1]", ctxt))) {
        if (VIR_ALLOC(pci_express) < 0)
            goto out;

        if (virPCIEDeviceInfoParseXML(ctxt, pciExpress, pci_express) < 0)
            goto out;

        pci_dev->pci_express = pci_express;
        pci_express = NULL;
        pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCIE;
    }

    ret = 0;
 out:
    VIR_FREE(nodes);
    VIR_FREE(tmp);
    virPCIEDeviceInfoFree(pci_express);
    return ret;
}


static int
virNodeDevCapSystemParseXML(xmlXPathContextPtr ctxt,
                            virNodeDeviceDefPtr def,
                            xmlNodePtr node,
                            virNodeDevCapSystemPtr syscap)
{
    virNodeDevCapSystemHardwarePtr hardware = &syscap->hardware;
    virNodeDevCapSystemFirmwarePtr firmware = &syscap->firmware;
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;
    char *tmp;

    ctxt->node = node;

    syscap->product_name = virXPathString("string(./product[1])", ctxt);

    hardware->vendor_name = virXPathString("string(./hardware/vendor[1])", ctxt);
    hardware->version     = virXPathString("string(./hardware/version[1])", ctxt);
    hardware->serial      = virXPathString("string(./hardware/serial[1])", ctxt);

    tmp = virXPathString("string(./hardware/uuid[1])", ctxt);
    if (!tmp) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("no system UUID supplied for '%s'"), def->name);
        goto out;
    }

    if (virUUIDParse(tmp, hardware->uuid) < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("malformed uuid element for '%s'"), def->name);
        VIR_FREE(tmp);
        goto out;
    }
    VIR_FREE(tmp);

    firmware->vendor_name  = virXPathString("string(./firmware/vendor[1])", ctxt);
    firmware->version      = virXPathString("string(./firmware/version[1])", ctxt);
    firmware->release_date = virXPathString("string(./firmware/release_date[1])", ctxt);

    ret = 0;
 out:
    return ret;
}


static int
virNodeDevCapMdevParseXML(xmlXPathContextPtr ctxt,
                          virNodeDeviceDefPtr def,
                          xmlNodePtr node,
                          virNodeDevCapMdevPtr mdev)
{
    VIR_XPATH_NODE_AUTORESTORE(ctxt);
    int ret = -1;

    ctxt->node = node;

    if (!(mdev->type = virXPathString("string(./type[1]/@id)", ctxt))) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("missing type id attribute for '%s'"), def->name);
        goto out;
    }

    /* 'iommuGroup' is optional, only report an error if the supplied value is
     * invalid (-2), not if it's missing (-1) */
    if (virXPathUInt("number(./iommuGroup[1]/@number)",
                     ctxt, &mdev->iommuGroupNumber) < -1) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("invalid iommuGroup number attribute for '%s'"),
                       def->name);
        goto out;
    }

    ret = 0;
 out:
    return ret;
}


static virNodeDevCapsDefPtr
virNodeDevCapsDefParseXML(xmlXPathContextPtr ctxt,
                          virNodeDeviceDefPtr def,
                          xmlNodePtr node,
                          int create,
                          const char *virt_type)
{
    virNodeDevCapsDefPtr caps;
    char *tmp;
    int val, ret = -1;

    if (VIR_ALLOC(caps) < 0)
        return NULL;

    tmp = virXMLPropString(node, "type");
    if (!tmp) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       "%s", _("missing capability type"));
        goto error;
    }

    if ((val = virNodeDevCapTypeFromString(tmp)) < 0) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                       _("unknown capability type '%s'"), tmp);
        VIR_FREE(tmp);
        goto error;
    }
    caps->data.type = val;
    VIR_FREE(tmp);

    switch (caps->data.type) {
    case VIR_NODE_DEV_CAP_SYSTEM:
        ret = virNodeDevCapSystemParseXML(ctxt, def, node, &caps->data.system);
        break;
    case VIR_NODE_DEV_CAP_PCI_DEV:
        ret = virNodeDevCapPCIDevParseXML(ctxt, def, node, &caps->data.pci_dev);
        break;
    case VIR_NODE_DEV_CAP_USB_DEV:
        ret = virNodeDevCapUSBDevParseXML(ctxt, def, node, &caps->data.usb_dev);
        break;
    case VIR_NODE_DEV_CAP_USB_INTERFACE:
        ret = virNodeDevCapUSBInterfaceParseXML(ctxt, def, node,
                                                &caps->data.usb_if);
        break;
    case VIR_NODE_DEV_CAP_NET:
        ret = virNodeDevCapNetParseXML(ctxt, def, node, &caps->data.net);
        break;
    case VIR_NODE_DEV_CAP_SCSI_HOST:
        ret = virNodeDevCapSCSIHostParseXML(ctxt, def, node,
                                            &caps->data.scsi_host,
                                            create,
                                            virt_type);
        break;
    case VIR_NODE_DEV_CAP_SCSI_TARGET:
        ret = virNodeDevCapSCSITargetParseXML(ctxt, def, node,
                                              &caps->data.scsi_target);
        break;
    case VIR_NODE_DEV_CAP_SCSI:
        ret = virNodeDevCapSCSIParseXML(ctxt, def, node, &caps->data.scsi);
        break;
    case VIR_NODE_DEV_CAP_STORAGE:
        ret = virNodeDevCapStorageParseXML(ctxt, def, node,
                                           &caps->data.storage);
        break;
    case VIR_NODE_DEV_CAP_DRM:
        ret = virNodeDevCapDRMParseXML(ctxt, def, node, &caps->data.drm);
        break;
    case VIR_NODE_DEV_CAP_MDEV:
        ret = virNodeDevCapMdevParseXML(ctxt, def, node, &caps->data.mdev);
        break;
    case VIR_NODE_DEV_CAP_CCW_DEV:
        ret = virNodeDevCapCCWParseXML(ctxt, def, node, &caps->data.ccw_dev);
        break;
    case VIR_NODE_DEV_CAP_MDEV_TYPES:
    case VIR_NODE_DEV_CAP_FC_HOST:
    case VIR_NODE_DEV_CAP_VPORTS:
    case VIR_NODE_DEV_CAP_SCSI_GENERIC:
    case VIR_NODE_DEV_CAP_LAST:
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("unknown capability type '%d' for '%s'"),
                       caps->data.type, def->name);
        ret = -1;
        break;
    }

    if (ret < 0)
        goto error;
    return caps;

 error:
    virNodeDevCapsDefFree(caps);
    return NULL;
}


static virNodeDeviceDefPtr
virNodeDeviceDefParseXML(xmlXPathContextPtr ctxt,
                         int create,
                         const char *virt_type)
{
    virNodeDeviceDefPtr def;
    virNodeDevCapsDefPtr *next_cap;
    xmlNodePtr *nodes = NULL;
    int n, m;
    size_t i;

    if (VIR_ALLOC(def) < 0)
        return NULL;

    /* Extract device name */
    if (create == EXISTING_DEVICE) {
        def->name = virXPathString("string(./name[1])", ctxt);

        if (!def->name) {
            virReportError(VIR_ERR_NO_NAME, NULL);
            goto error;
        }
    } else {
        def->name = g_strdup("new device");
    }

    def->sysfs_path = virXPathString("string(./path[1])", ctxt);

    /* Parse devnodes */
    if ((n = virXPathNodeSet("./devnode", ctxt, &nodes)) < 0)
        goto error;

    if (VIR_ALLOC_N(def->devlinks, n + 1) < 0)
        goto error;

    for (i = 0, m = 0; i < n; i++) {
        xmlNodePtr node = nodes[i];
        char *tmp = virXMLPropString(node, "type");
        int val;

        if (!tmp) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           "%s", _("missing devnode type"));
            goto error;
        }

        val = virNodeDevDevnodeTypeFromString(tmp);

        if (val < 0) {
            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                           _("unknown devnode type '%s'"), tmp);
            VIR_FREE(tmp);
            goto error;
        }
        VIR_FREE(tmp);

        switch ((virNodeDevDevnodeType)val) {
        case VIR_NODE_DEV_DEVNODE_DEV:
            def->devnode = (char*)xmlNodeGetContent(node);
            break;
        case VIR_NODE_DEV_DEVNODE_LINK:
            def->devlinks[m++] = (char*)xmlNodeGetContent(node);
            break;
        case VIR_NODE_DEV_DEVNODE_LAST:
            break;
        }
    }

    /* Extract device parent, if any */
    def->parent = virXPathString("string(./parent[1])", ctxt);
    def->parent_wwnn = virXPathString("string(./parent[1]/@wwnn)", ctxt);
    def->parent_wwpn = virXPathString("string(./parent[1]/@wwpn)", ctxt);
    if (def->parent_wwnn && !def->parent_wwpn) {
        virReportError(VIR_ERR_XML_ERROR,
                       _("when providing parent wwnn='%s', the "
                         "wwpn must also be provided"),
                       def->parent_wwnn);
        goto error;
    }

    if (!def->parent_wwnn && def->parent_wwpn) {
        virReportError(VIR_ERR_XML_ERROR,
                       _("when providing parent wwpn='%s', the "
                         "wwnn must also be provided"),
                       def->parent_wwpn);
        goto error;
    }
    def->parent_fabric_wwn = virXPathString("string(./parent[1]/@fabric_wwn)",
                                            ctxt);

    /* Parse device capabilities */
    VIR_FREE(nodes);
    if ((n = virXPathNodeSet("./capability", ctxt, &nodes)) < 0)
        goto error;

    if (n == 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("no device capabilities for '%s'"),
                       def->name);
        goto error;
    }

    next_cap = &def->caps;
    for (i = 0; i < n; i++) {
        *next_cap = virNodeDevCapsDefParseXML(ctxt, def,
                                              nodes[i],
                                              create,
                                              virt_type);
        if (!*next_cap)
            goto error;

        next_cap = &(*next_cap)->next;
    }
    VIR_FREE(nodes);

    return def;

 error:
    virNodeDeviceDefFree(def);
    VIR_FREE(nodes);
    return NULL;
}


virNodeDeviceDefPtr
virNodeDeviceDefParseNode(xmlDocPtr xml,
                          xmlNodePtr root,
                          int create,
                          const char *virt_type)
{
    g_autoptr(xmlXPathContext) ctxt = NULL;

    if (!virXMLNodeNameEqual(root, "device")) {
        virReportError(VIR_ERR_XML_ERROR,
                       _("unexpected root element <%s> "
                         "expecting <device>"),
                       root->name);
        return NULL;
    }

    if (!(ctxt = virXMLXPathContextNew(xml)))
        return NULL;

    ctxt->node = root;
    return virNodeDeviceDefParseXML(ctxt, create, virt_type);
}


static virNodeDeviceDefPtr
virNodeDeviceDefParse(const char *str,
                      const char *filename,
                      int create,
                      const char *virt_type)
{
    xmlDocPtr xml;
    virNodeDeviceDefPtr def = NULL;

    if ((xml = virXMLParse(filename, str, _("(node_device_definition)")))) {
        def = virNodeDeviceDefParseNode(xml, xmlDocGetRootElement(xml),
                                        create, virt_type);
        xmlFreeDoc(xml);
    }

    return def;
}


virNodeDeviceDefPtr
virNodeDeviceDefParseString(const char *str,
                            int create,
                            const char *virt_type)
{
    return virNodeDeviceDefParse(str, NULL, create, virt_type);
}


virNodeDeviceDefPtr
virNodeDeviceDefParseFile(const char *filename,
                          int create,
                          const char *virt_type)
{
    return virNodeDeviceDefParse(NULL, filename, create, virt_type);
}


/*
 * Return fc_host dev's WWNN and WWPN
 */
int
virNodeDeviceGetWWNs(virNodeDeviceDefPtr def,
                     char **wwnn,
                     char **wwpn)
{
    virNodeDevCapsDefPtr cap = NULL;

    cap = def->caps;
    while (cap != NULL) {
        if (cap->data.type == VIR_NODE_DEV_CAP_SCSI_HOST &&
            cap->data.scsi_host.flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
            *wwnn = g_strdup(cap->data.scsi_host.wwnn);
            *wwpn = g_strdup(cap->data.scsi_host.wwpn);
            break;
        }

        cap = cap->next;
    }

    if (cap == NULL) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       "%s", _("Device is not a fibre channel HBA"));
        return -1;
    }

    return 0;
}


void
virNodeDevCapsDefFree(virNodeDevCapsDefPtr caps)
{
    size_t i = 0;
    virNodeDevCapDataPtr data = &caps->data;

    switch (caps->data.type) {
    case VIR_NODE_DEV_CAP_SYSTEM:
        VIR_FREE(data->system.product_name);
        VIR_FREE(data->system.hardware.vendor_name);
        VIR_FREE(data->system.hardware.version);
        VIR_FREE(data->system.hardware.serial);
        VIR_FREE(data->system.firmware.vendor_name);
        VIR_FREE(data->system.firmware.version);
        VIR_FREE(data->system.firmware.release_date);
        break;
    case VIR_NODE_DEV_CAP_PCI_DEV:
        VIR_FREE(data->pci_dev.product_name);
        VIR_FREE(data->pci_dev.vendor_name);
        VIR_FREE(data->pci_dev.physical_function);
        for (i = 0; i < data->pci_dev.num_virtual_functions; i++)
            VIR_FREE(data->pci_dev.virtual_functions[i]);
        VIR_FREE(data->pci_dev.virtual_functions);
        for (i = 0; i < data->pci_dev.nIommuGroupDevices; i++)
            VIR_FREE(data->pci_dev.iommuGroupDevices[i]);
        VIR_FREE(data->pci_dev.iommuGroupDevices);
        virPCIEDeviceInfoFree(data->pci_dev.pci_express);
        for (i = 0; i < data->pci_dev.nmdev_types; i++)
            virMediatedDeviceTypeFree(data->pci_dev.mdev_types[i]);
        VIR_FREE(data->pci_dev.mdev_types);
        break;
    case VIR_NODE_DEV_CAP_USB_DEV:
        VIR_FREE(data->usb_dev.product_name);
        VIR_FREE(data->usb_dev.vendor_name);
        break;
    case VIR_NODE_DEV_CAP_USB_INTERFACE:
        VIR_FREE(data->usb_if.description);
        break;
    case VIR_NODE_DEV_CAP_NET:
        VIR_FREE(data->net.ifname);
        VIR_FREE(data->net.address);
        virBitmapFree(data->net.features);
        data->net.features = NULL;
        break;
    case VIR_NODE_DEV_CAP_SCSI_HOST:
        VIR_FREE(data->scsi_host.wwnn);
        VIR_FREE(data->scsi_host.wwpn);
        VIR_FREE(data->scsi_host.fabric_wwn);
        break;
    case VIR_NODE_DEV_CAP_SCSI_TARGET:
        VIR_FREE(data->scsi_target.name);
        VIR_FREE(data->scsi_target.rport);
        VIR_FREE(data->scsi_target.wwpn);
        break;
    case VIR_NODE_DEV_CAP_SCSI:
        VIR_FREE(data->scsi.type);
        break;
    case VIR_NODE_DEV_CAP_STORAGE:
        VIR_FREE(data->storage.block);
        VIR_FREE(data->storage.bus);
        VIR_FREE(data->storage.drive_type);
        VIR_FREE(data->storage.model);
        VIR_FREE(data->storage.vendor);
        VIR_FREE(data->storage.serial);
        VIR_FREE(data->storage.media_label);
        break;
    case VIR_NODE_DEV_CAP_SCSI_GENERIC:
        VIR_FREE(data->sg.path);
        break;
    case VIR_NODE_DEV_CAP_MDEV:
        VIR_FREE(data->mdev.type);
        break;
    case VIR_NODE_DEV_CAP_MDEV_TYPES:
    case VIR_NODE_DEV_CAP_DRM:
    case VIR_NODE_DEV_CAP_FC_HOST:
    case VIR_NODE_DEV_CAP_VPORTS:
    case VIR_NODE_DEV_CAP_CCW_DEV:
    case VIR_NODE_DEV_CAP_LAST:
        /* This case is here to shutup the compiler */
        break;
    }

    VIR_FREE(caps);
}


int
virNodeDeviceUpdateCaps(virNodeDeviceDefPtr def)
{
    virNodeDevCapsDefPtr cap = def->caps;

    while (cap) {
        switch (cap->data.type) {
        case VIR_NODE_DEV_CAP_SCSI_HOST:
            virNodeDeviceGetSCSIHostCaps(&cap->data.scsi_host);
            break;
        case VIR_NODE_DEV_CAP_SCSI_TARGET:
            virNodeDeviceGetSCSITargetCaps(def->sysfs_path,
                                           &cap->data.scsi_target);
            break;
        case VIR_NODE_DEV_CAP_NET:
            if (virNetDevGetLinkInfo(cap->data.net.ifname,
                                     &cap->data.net.lnk) < 0)
                return -1;
            virBitmapFree(cap->data.net.features);
            if (virNetDevGetFeatures(cap->data.net.ifname,
                                     &cap->data.net.features) < 0)
                return -1;
            break;
        case VIR_NODE_DEV_CAP_PCI_DEV:
            if (virNodeDeviceGetPCIDynamicCaps(def->sysfs_path,
                                               &cap->data.pci_dev) < 0)
                return -1;
            break;

            /* all types that (supposedly) don't require any updates
             * relative to what's in the cache.
             */
        case VIR_NODE_DEV_CAP_DRM:
        case VIR_NODE_DEV_CAP_SYSTEM:
        case VIR_NODE_DEV_CAP_USB_DEV:
        case VIR_NODE_DEV_CAP_USB_INTERFACE:
        case VIR_NODE_DEV_CAP_SCSI:
        case VIR_NODE_DEV_CAP_STORAGE:
        case VIR_NODE_DEV_CAP_FC_HOST:
        case VIR_NODE_DEV_CAP_VPORTS:
        case VIR_NODE_DEV_CAP_SCSI_GENERIC:
        case VIR_NODE_DEV_CAP_MDEV_TYPES:
        case VIR_NODE_DEV_CAP_MDEV:
        case VIR_NODE_DEV_CAP_CCW_DEV:
        case VIR_NODE_DEV_CAP_LAST:
            break;
        }
        cap = cap->next;
    }

    return 0;
}


/**
 * virNodeDeviceCapsListExport:
 * @def: node device definition
 * @list: pointer to an array to store all supported capabilities by a device
 *
 * Takes the definition, scans through all the capabilities that the device
 * supports (including the nested caps) and populates a newly allocated list
 * with them. Caller is responsible for freeing the list.
 * If NULL is passed to @list, only the number of caps will be returned.
 *
 * Returns the number of capabilities the device supports, -1 on error.
 */
int
virNodeDeviceCapsListExport(virNodeDeviceDefPtr def,
                            virNodeDevCapType **list)
{
    virNodeDevCapsDefPtr caps = NULL;
    virNodeDevCapType *tmp = NULL;
    bool want_list = !!list;
    int ncaps = 0;
    int ret = -1;

#define MAYBE_ADD_CAP(cap) \
    do { \
        if (want_list) \
            tmp[ncaps] = cap; \
    } while (0)

    if (virNodeDeviceUpdateCaps(def) < 0)
        goto cleanup;

    if (want_list && VIR_ALLOC_N(tmp, VIR_NODE_DEV_CAP_LAST - 1) < 0)
        goto cleanup;

    for (caps = def->caps; caps; caps = caps->next) {
        unsigned int flags;

        MAYBE_ADD_CAP(caps->data.type);
        ncaps++;

        /* check nested caps for a given type as well */
        if (caps->data.type == VIR_NODE_DEV_CAP_SCSI_HOST) {
            flags = caps->data.scsi_host.flags;

            if (flags & VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
                MAYBE_ADD_CAP(VIR_NODE_DEV_CAP_FC_HOST);
                ncaps++;
            }

            if (flags  & VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS) {
                MAYBE_ADD_CAP(VIR_NODE_DEV_CAP_VPORTS);
                ncaps++;
            }
        }

        if (caps->data.type == VIR_NODE_DEV_CAP_PCI_DEV) {
            flags = caps->data.pci_dev.flags;

            if (flags & VIR_NODE_DEV_CAP_FLAG_PCI_MDEV) {
                MAYBE_ADD_CAP(VIR_NODE_DEV_CAP_MDEV_TYPES);
                ncaps++;
            }
        }
    }

#undef MAYBE_ADD_CAP

    if (want_list)
        *list = g_steal_pointer(&tmp);
    ret = ncaps;
 cleanup:
    VIR_FREE(tmp);
    return ret;
}


#ifdef __linux__

int
virNodeDeviceGetSCSIHostCaps(virNodeDevCapSCSIHostPtr scsi_host)
{
    char *tmp = NULL;
    int ret = -1;

    if ((scsi_host->unique_id =
         virSCSIHostGetUniqueId(NULL, scsi_host->host)) < 0) {
        VIR_DEBUG("Failed to read unique_id for host%d", scsi_host->host);
        scsi_host->unique_id = -1;
    }

    VIR_DEBUG("Checking if host%d is an FC HBA", scsi_host->host);

    if (virVHBAPathExists(NULL, scsi_host->host)) {
        scsi_host->flags |= VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST;

        if (!(tmp = virVHBAGetConfig(NULL, scsi_host->host, "port_name"))) {
            VIR_WARN("Failed to read WWPN for host%d", scsi_host->host);
            goto cleanup;
        }
        VIR_FREE(scsi_host->wwpn);
        scsi_host->wwpn = g_steal_pointer(&tmp);

        if (!(tmp = virVHBAGetConfig(NULL, scsi_host->host, "node_name"))) {
            VIR_WARN("Failed to read WWNN for host%d", scsi_host->host);
            goto cleanup;
        }
        VIR_FREE(scsi_host->wwnn);
        scsi_host->wwnn = g_steal_pointer(&tmp);

        if ((tmp = virVHBAGetConfig(NULL, scsi_host->host, "fabric_name"))) {
            VIR_FREE(scsi_host->fabric_wwn);
            scsi_host->fabric_wwn = g_steal_pointer(&tmp);
        }
    }

    if (virVHBAIsVportCapable(NULL, scsi_host->host)) {
        scsi_host->flags |= VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS;

        if (!(tmp = virVHBAGetConfig(NULL, scsi_host->host,
                                     "max_npiv_vports"))) {
            VIR_WARN("Failed to read max_npiv_vports for host%d",
                     scsi_host->host);
            goto cleanup;
        }

        if (virStrToLong_i(tmp, NULL, 10, &scsi_host->max_vports) < 0) {
            VIR_WARN("Failed to parse value of max_npiv_vports '%s'", tmp);
            goto cleanup;
        }

        VIR_FREE(tmp);
        if (!(tmp = virVHBAGetConfig(NULL, scsi_host->host,
                                      "npiv_vports_inuse"))) {
            VIR_WARN("Failed to read npiv_vports_inuse for host%d",
                     scsi_host->host);
            goto cleanup;
        }

        if (virStrToLong_i(tmp, NULL, 10, &scsi_host->vports) < 0) {
            VIR_WARN("Failed to parse value of npiv_vports_inuse '%s'", tmp);
            goto cleanup;
        }
    }

    ret = 0;
 cleanup:
    if (ret < 0) {
        /* Clear the two flags in case of producing confusing XML output */
        scsi_host->flags &= ~(VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST |
                              VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS);

        VIR_FREE(scsi_host->wwnn);
        VIR_FREE(scsi_host->wwpn);
        VIR_FREE(scsi_host->fabric_wwn);
    }
    VIR_FREE(tmp);
    return ret;
}


int
virNodeDeviceGetSCSITargetCaps(const char *sysfsPath,
                               virNodeDevCapSCSITargetPtr scsi_target)
{
    int ret = -1;
    char *dir = NULL, *rport = NULL;

    VIR_DEBUG("Checking if '%s' is an FC remote port", scsi_target->name);

    /* /sys/devices/[...]/host0/rport-0:0-0/target0:0:0 -> rport-0:0-0 */
    dir = g_path_get_dirname(sysfsPath);

    rport = g_path_get_basename(dir);

    if (!virFCIsCapableRport(rport))
        goto cleanup;

    VIR_FREE(scsi_target->rport);
    scsi_target->rport = g_steal_pointer(&rport);

    if (virFCReadRportValue(scsi_target->rport, "port_name",
                            &scsi_target->wwpn) < 0) {
        VIR_WARN("Failed to read port_name for '%s'", scsi_target->rport);
        goto cleanup;
    }

    scsi_target->flags |= VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
    ret = 0;

 cleanup:
    if (ret < 0) {
        VIR_FREE(scsi_target->rport);
        VIR_FREE(scsi_target->wwpn);
        scsi_target->flags &= ~VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
    }
    VIR_FREE(rport);
    VIR_FREE(dir);

    return ret;
}


static int
virNodeDeviceGetPCISRIOVCaps(const char *sysfsPath,
                             virNodeDevCapPCIDevPtr pci_dev)
{
    size_t i;
    int ret;

    /* this could be a refresh, so clear out the old data */
    for (i = 0; i < pci_dev->num_virtual_functions; i++)
       VIR_FREE(pci_dev->virtual_functions[i]);
    VIR_FREE(pci_dev->virtual_functions);
    VIR_FREE(pci_dev->physical_function);
    pci_dev->num_virtual_functions = 0;
    pci_dev->max_virtual_functions = 0;
    pci_dev->flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;
    pci_dev->flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;

    ret = virPCIGetPhysicalFunction(sysfsPath,
                                    &pci_dev->physical_function);
    if (ret < 0)
        return ret;

    if (pci_dev->physical_function)
        pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;

    ret = virPCIGetVirtualFunctions(sysfsPath, &pci_dev->virtual_functions,
                                    &pci_dev->num_virtual_functions,
                                    &pci_dev->max_virtual_functions);
    if (ret < 0)
        return ret;

    if (pci_dev->num_virtual_functions > 0 ||
        pci_dev->max_virtual_functions > 0)
        pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;

    return ret;
}


static int
virNodeDeviceGetPCIIOMMUGroupCaps(virNodeDevCapPCIDevPtr pci_dev)
{
    size_t i;
    int tmpGroup;
    virPCIDeviceAddress addr;

    /* this could be a refresh, so clear out the old data */
    for (i = 0; i < pci_dev->nIommuGroupDevices; i++)
       VIR_FREE(pci_dev->iommuGroupDevices[i]);
    VIR_FREE(pci_dev->iommuGroupDevices);
    pci_dev->nIommuGroupDevices = 0;
    pci_dev->iommuGroupNumber = 0;

    addr.domain = pci_dev->domain;
    addr.bus = pci_dev->bus;
    addr.slot = pci_dev->slot;
    addr.function = pci_dev->function;
    tmpGroup = virPCIDeviceAddressGetIOMMUGroupNum(&addr);
    if (tmpGroup == -1) {
        /* error was already reported */
        return -1;
    }
    if (tmpGroup == -2)
        /* -2 return means there is no iommu_group data */
        return 0;
    if (tmpGroup >= 0) {
        if (virPCIDeviceAddressGetIOMMUGroupAddresses(&addr, &pci_dev->iommuGroupDevices,
                                                      &pci_dev->nIommuGroupDevices) < 0)
            return -1;
        pci_dev->iommuGroupNumber = tmpGroup;
    }

    return 0;
}


static int
virNodeDeviceGetPCIMdevTypesCaps(const char *sysfspath,
                                 virNodeDevCapPCIDevPtr pci_dev)
{
    virMediatedDeviceTypePtr *types = NULL;
    int rc = 0;
    size_t i;

    /* this could be a refresh, so clear out the old data */
    for (i = 0; i < pci_dev->nmdev_types; i++)
       virMediatedDeviceTypeFree(pci_dev->mdev_types[i]);
    VIR_FREE(pci_dev->mdev_types);
    pci_dev->nmdev_types = 0;
    pci_dev->flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;

    rc = virPCIGetMdevTypes(sysfspath, &types);

    if (rc <= 0)
        return rc;

    pci_dev->mdev_types = g_steal_pointer(&types);
    pci_dev->nmdev_types = rc;
    pci_dev->flags |= VIR_NODE_DEV_CAP_FLAG_PCI_MDEV;

    return 0;
}


/* virNodeDeviceGetPCIDynamicCaps() get info that is stored in sysfs
 * about devices related to this device, i.e. things that can change
 * without this device itself changing. These must be refreshed
 * anytime full XML of the device is requested, because they can
 * change with no corresponding notification from the kernel/udev.
 */
int
virNodeDeviceGetPCIDynamicCaps(const char *sysfsPath,
                               virNodeDevCapPCIDevPtr pci_dev)
{
    if (virNodeDeviceGetPCISRIOVCaps(sysfsPath, pci_dev) < 0 ||
        virNodeDeviceGetPCIIOMMUGroupCaps(pci_dev) < 0 ||
        virNodeDeviceGetPCIMdevTypesCaps(sysfsPath, pci_dev) < 0)
        return -1;
    return 0;
}

#else

int
virNodeDeviceGetSCSIHostCaps(virNodeDevCapSCSIHostPtr scsi_host G_GNUC_UNUSED)
{
    return -1;
}

int
virNodeDeviceGetPCIDynamicCaps(const char *sysfsPath G_GNUC_UNUSED,
                               virNodeDevCapPCIDevPtr pci_dev G_GNUC_UNUSED)
{
    return -1;
}


int virNodeDeviceGetSCSITargetCaps(const char *sysfsPath G_GNUC_UNUSED,
                                   virNodeDevCapSCSITargetPtr scsi_target G_GNUC_UNUSED)
{
    return -1;
}

#endif /* __linux__ */