12:29 p.m.
Coupled with the recent virsh nodedev-* doc patch, this should now
give a better picture of libvirt node device handling.
* docs/formatnode.html.in: Fill in page.
---
Done mostly by scraping docs/schemas/nodedev.rng, and examples
provided from my laptop with some slight munging (hopefully I'm
not exposing my laptop to attacks by publishing details like that :)
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1 files changed, 219 insertions(+), 0 deletions(-)
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<html>
<body>
<h1>Node devices XML format</h1>
+
+ <ul id="toc"></ul>
+
+ <h2><a name="NodedevAttributes">Node Device
XML</a></h2>
+
+ <p>
+ There are several libvirt functions, all with the
+ prefix <code>virNodeDevice</code>, which deal with management of
+ host devices that can be handed to guests via passthrough as
+ <hostdev> elements
+ in <a href="formatdomain.html#elementsUSB">the domain
XML</a>.
+ These devices are represented as a hierarchy, where a device on
+ a bus has a parent of the bus controller device; the root of the
+ hierarchy is the node named "computer".
+ </p>
+
+ <p>
+ When represented in XML, a node device uses the
+ top-level <code>device</code> element, with the following
+ elements present according to the type of device:
+ </p>
+ <dl>
+ <dt><code>name</code></dt>
+ <dd>The name for this device. The name will be alphanumeric,
+ with words separated by underscore. For many devices, the
+ name is just the bus type and address, as in
+ "pci_0000_00_02_1" or "usb_1_5_3", but some devices are able
+ to provide more specific names, such as
+ "net_eth1_00_27_13_6a_fe_00".
+ </dd>
+ <dt><code>parent</code></dt>
+ <dd>If this element is present, it names the parent device (that
+ is, a controller to which this node belongs).
+ </dd>
+ <dt><code>capability</code></dt>
+ <dd>This node appears for each capability that libvirt
+ associates with a node. A mandatory
+ attribute <code>type</code> lists which category the device
+ belongs to, and controls which further subelements will be
+ present to describe the node:
+ <dl>
+ <dt><code>system</code></dt>
+ <dd>Describes the overall host. Sub-elements include:
+ <dl>
+ <dt><code>product</code></dt>
+ <dd>If present, a simple text string giving the product
+ name of the system.</dd>
+ <dt><code>hardware</code></dt>
+ <dd>Describes the hardware of the system, including
+ sub-elements for <code>vendor</code>,
<code>version</code>,
+ <code>serial</code>, and
<code>uuid</code>.</dd>
+ <dt><code>firmware</code></dt>
+ <dd>Describes the firmware of the system, including
+ sub-elements for <code>vendor</code>,
<code>version</code>,
+ and <code>release_date</code>.</dd>
+ </dl>
+ </dd>
+ <dt><code>pci</code></dt>
+ <dd>Describes a device on the host's PCI bus. Sub-elements
+ include:
+ <dl>
+ <dt><code>domain</code></dt>
+ <dd>Which domain the device belongs to.</dd>
+ <dt><code>bus</code></dt>
+ <dd>Which bus within the domain.</dd>
+ <dt><code>slot</code></dt>
+ <dd>Which slot within the bus.</dd>
+ <dt><code>function</code></dt>
+ <dd>Which function within the slot.</dd>
+ <dt><code>product</code></dt>
+ <dd>Product details from the device ROM, including an
+ attribute <code>id</code> with the hexadecimal product
+ id, and an optional text description of that id.</dd>
+ <dt><code>vendor</code></dt>
+ <dd>Vendor details from the device ROM, including an
+ attribute <code>id</code> with the hexadecimal vendor
+ id, and an optional text name of that vendor.</dd>
+ </dl>
+ </dd>
+ <dt><code>usb_device</code></dt>
+ <dd>Describes a device on the host's USB bus, based on its
+ location within the bus. Sub-elements include:
+ <dl>
+ <dt><code>bus</code></dt>
+ <dd>Which bus the device belongs to.</dd>
+ <dt><code>device</code></dt>
+ <dd>Which device within the bus.</dd>
+ <dt><code>product</code></dt>
+ <dd>Product details from the device ROM, including an
+ attribute <code>id</code> with the hexadecimal product
+ id, and an optional text description of that id.</dd>
+ <dt><code>vendor</code></dt>
+ <dd>Vendor details from the device ROM, including an
+ attribute <code>id</code> with the hexadecimal vendor
+ id, and an optional text name of that vendor.</dd>
+ </dl>
+ </dd>
+ <dt><code>usb</code></dt>
+ <dd>Describes a USB device, based on its advertised driver
+ interface. Sub-elements include:
+ <dl>
+ <dt><code>number</code></dt>
+ <dd>The device number.</dd>
+ <dt><code>number</code></dt>
+ <dd>The device class.</dd>
+ <dt><code>number</code></dt>
+ <dd>The device subclass.</dd>
+ <dt><code>number</code></dt>
+ <dd>The device protocol.</dd>
+ <dt><code>description</code></dt>
+ <dd>If present, a description of the device.</dd>
+ </dl>
+ </dd>
+ <dt><code>net</code></dt>
+ <dd>Describes a device capable for use as a network
+ interface. Sub-elements include:
+ <dl>
+ <dt><code>interface</code></dt>
+ <dd>The interface name tied to this device.</dd>
+ <dt><code>address</code></dt>
+ <dd>If present, the MAC address of the device.</dd>
+ <dt><code>capability</code></dt>
+ <dd>A network protocol exposed by the device, where the
+ attribute <code>type</code> can be "80203" for
IEEE
+ 802.3, or "80211" for various flavors of IEEE 802.11.
+ </dl>
+ </dd>
+ <dt><code>scsi_host</code></dt>
+ <dd>Describes a SCSI host device. Sub-elements include:
+ <dl>
+ <dt><code>host</code></dt>
+ <dd>The SCSI host number.</dd>
+ </dl>
+ </dd>
+ <dt><code>scsi</code></dt>
+ <dd>Desribes a SCSI device. Sub-elements include:
+ <dl>
+ <dt><code>host</code></dt>
+ <dd>The SCSI host containing the device.</dd>
+ <dt><code>bus</code></dt>
+ <dd>The bus within the host.</dd>
+ <dt><code>target</code></dt>
+ <dd>The target within the bus.</dd>
+ <dt><code>lun</code></dt>
+ <dd>The lun within the target.</dd>
+ <dt><code>type</code></dt>
+ <dd>The type of SCSI device.</dd>
+ </dl>
+ </dd>
+ <dt><code>storage</code></dt>
+ <dd>Describes a device usable for storage. Sub-elements
+ include:
+ <dl>
+ <dt><code>block</code></dt>
+ <dd>A block device file name that accesses the storage
+ present on the device.</dd>
+ <dt><code>bus</code></dt>
+ <dd>If present, the name of the bus the device is found
+ on.</dd>
+ <dt><code>drive_type</code></dt>
+ <dd>The type of the drive, such as "disk" or
+ "cdrom".</dd>
+ <dt><code>model</code></dt>
+ <dd>Any model information available from the
+ device.</dd>
+ <dt><code>vendor</code></dt>
+ <dd>Any vendor information available from the
+ device.</dd>
+ <dt><code>serial</code></dt>
+ <dd>Any serial number information available from the
+ device.</dd>
+ <dt><code>size</code></dt>
+ <dd>For fixed-size storage, the amount of storage
+ available.</dd>
+ <dt><code>capability</code></dt>
+ <dd>If present, an additional capability is listed via
+ the attribute <code>type</code>. Current capabilites
+ include "hotpluggable" and "removable", with the
+ latter implying the following
+ sub-elements: <code>media_available</code> (0 or
+ 1), <code>media_size</code>,
+ and <code>media_label</code>.</dd>
+ </dl>
+ </dd>
+ </dl>
+ </dd>
+ </dl>
+
+ <h2><a name="nodeExample">Examples</a></h2>
+
+ <p>The following are some example node device XML outputs:</p>
+ <pre>
+<device>
+ <name>computer</name>
+ <capability type='system'>
+ <product>2241B36</product>
+ <hardware>
+ <vendor>LENOVO</vendor>
+ <version>ThinkPad T500</version>
+ <serial>R89055N</serial>
+ <uuid>c9488981-5049-11cb-9c1c-993d0230b4cd</uuid>
+ </hardware>
+ <firmware>
+ <vendor>LENOVO</vendor>
+ <version>6FET82WW (3.12 )</version>
+ <release_date>11/26/2009</release_date>
+ </firmware>
+ </capability>
+</device>
+<device>
+ <name>net_eth1_00_27_13_6a_fe_00</name>
+ <parent>pci_0000_00_19_0</parent>
+ <capability type='net'>
+ <interface>eth1</interface>
+ <address>00:27:13:6a:fe:00</address>
+ <capability type='80203'/>
+ </capability>
+</device></pre>
+
</body>
</html>
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